diff --git a/app/models/alerts.py b/app/models/alerts.py
new file mode 100644
index 0000000..81b4fe8
--- /dev/null
+++ b/app/models/alerts.py
@@ -0,0 +1,64 @@
+"""Alert notification domain models."""
+
+from __future__ import annotations
+
+import json
+from dataclasses import asdict, dataclass
+from pathlib import Path
+from typing import Any
+
+
+@dataclass
+class AlertEvent:
+    severity: str
+    message: str
+    ltv_ratio: float
+    warning_threshold: float
+    critical_threshold: float
+    spot_price: float
+    updated_at: str
+    email_alerts_enabled: bool
+
+    def to_dict(self) -> dict[str, Any]:
+        return asdict(self)
+
+    @classmethod
+    def from_dict(cls, data: dict[str, Any]) -> "AlertEvent":
+        return cls(**{k: v for k, v in data.items() if k in cls.__dataclass_fields__})
+
+
+@dataclass
+class AlertStatus:
+    severity: str
+    message: str
+    ltv_ratio: float
+    warning_threshold: float
+    critical_threshold: float
+    email_alerts_enabled: bool
+    history: list[AlertEvent]
+
+
+class AlertHistoryRepository:
+    """File-backed alert history store."""
+
+    HISTORY_PATH = Path("data/alert_history.json")
+
+    def __init__(self, history_path: Path | None = None) -> None:
+        self.history_path = history_path or self.HISTORY_PATH
+        self.history_path.parent.mkdir(parents=True, exist_ok=True)
+
+    def load(self) -> list[AlertEvent]:
+        if not self.history_path.exists():
+            return []
+        try:
+            with self.history_path.open() as f:
+                data = json.load(f)
+        except (json.JSONDecodeError, OSError):
+            return []
+        if not isinstance(data, list):
+            return []
+        return [AlertEvent.from_dict(item) for item in data if isinstance(item, dict)]
+
+    def save(self, events: list[AlertEvent]) -> None:
+        with self.history_path.open("w") as f:
+            json.dump([event.to_dict() for event in events], f, indent=2)
diff --git a/app/models/portfolio.py b/app/models/portfolio.py
index 2751176..4bec44e 100644
--- a/app/models/portfolio.py
+++ b/app/models/portfolio.py
@@ -154,6 +154,8 @@ class PortfolioConfig:
             raise ValueError("Margin threshold must be between 10% and 95%")
         if not 0.1 <= self.ltv_warning <= 0.95:
             raise ValueError("LTV warning level must be between 10% and 95%")
+        if self.ltv_warning >= self.margin_threshold:
+            raise ValueError("LTV warning level must be less than the margin threshold")
         if self.refresh_interval < 1:
             raise ValueError("Refresh interval must be at least 1 second")
 
diff --git a/app/pages/overview.py b/app/pages/overview.py
index ca07698..276bf11 100644
--- a/app/pages/overview.py
+++ b/app/pages/overview.py
@@ -5,8 +5,9 @@ from datetime import datetime, timezone
 from nicegui import ui
 
 from app.components import PortfolioOverview
-from app.models.portfolio import PortfolioConfig, get_portfolio_repository
+from app.models.portfolio import get_portfolio_repository
 from app.pages.common import dashboard_page, quick_recommendations, recommendation_style, strategy_catalog
+from app.services.alerts import AlertService, build_portfolio_alert_context
 from app.services.runtime import get_data_service
 
 _DEFAULT_CASH_BUFFER = 18_500.0
@@ -22,30 +23,12 @@ def _format_timestamp(value: str | None) -> str:
     return timestamp.astimezone(timezone.utc).strftime("%Y-%m-%d %H:%M:%S UTC")
 
 
-def _build_live_portfolio(config: PortfolioConfig, quote: dict[str, object]) -> dict[str, float | str]:
-    fallback_spot_price = float(config.entry_price or 0.0)
-    spot_price = float(quote.get("price", fallback_spot_price))
-    configured_gold_value = float(config.gold_value or 0.0)
-    gold_units = float(config.gold_ounces or 0.0)
-    live_gold_value = gold_units * spot_price
-    loan_amount = float(config.loan_amount)
-    margin_call_ltv = float(config.margin_threshold)
-    ltv_ratio = loan_amount / live_gold_value if live_gold_value > 0 else 0.0
-
+def _alert_badge_classes(severity: str) -> str:
     return {
-        "spot_price": spot_price,
-        "gold_units": gold_units,
-        "gold_value": live_gold_value,
-        "loan_amount": loan_amount,
-        "ltv_ratio": ltv_ratio,
-        "net_equity": live_gold_value - loan_amount,
-        "margin_call_ltv": margin_call_ltv,
-        "margin_call_price": loan_amount / (margin_call_ltv * gold_units) if gold_units > 0 else 0.0,
-        "cash_buffer": max(live_gold_value - configured_gold_value, 0.0) + _DEFAULT_CASH_BUFFER,
-        "hedge_budget": float(config.monthly_budget),
-        "quote_source": str(quote.get("source", "unknown")),
-        "quote_updated_at": str(quote.get("updated_at", "")),
-    }
+        "critical": "rounded-full bg-rose-100 px-3 py-1 text-xs font-semibold text-rose-700 dark:bg-rose-500/15 dark:text-rose-300",
+        "warning": "rounded-full bg-amber-100 px-3 py-1 text-xs font-semibold text-amber-700 dark:bg-amber-500/15 dark:text-amber-300",
+        "ok": "rounded-full bg-emerald-100 px-3 py-1 text-xs font-semibold text-emerald-700 dark:bg-emerald-500/15 dark:text-emerald-300",
+    }.get(severity, "rounded-full bg-slate-100 px-3 py-1 text-xs font-semibold text-slate-700")
 
 
 @ui.page("/")
@@ -55,7 +38,16 @@ async def overview_page() -> None:
     data_service = get_data_service()
     symbol = data_service.default_symbol
     quote = await data_service.get_quote(symbol)
-    portfolio = _build_live_portfolio(config, quote)
+    portfolio = build_portfolio_alert_context(
+        config,
+        spot_price=float(quote.get("price", float(config.entry_price or 0.0))),
+        source=str(quote.get("source", "unknown")),
+        updated_at=str(quote.get("updated_at", "")),
+    )
+    configured_gold_value = float(config.gold_value or 0.0)
+    portfolio["cash_buffer"] = max(float(portfolio["gold_value"]) - configured_gold_value, 0.0) + _DEFAULT_CASH_BUFFER
+    portfolio["hedge_budget"] = float(config.monthly_budget)
+    alert_status = AlertService().evaluate(config, portfolio)
     quote_status = (
         f"Live quote source: {portfolio['quote_source']} · "
         f"Last updated {_format_timestamp(str(portfolio['quote_updated_at']))}"
@@ -72,6 +64,23 @@ async def overview_page() -> None:
                 f"Configured collateral baseline: ${config.gold_value:,.0f} · Loan ${config.loan_amount:,.0f}"
             ).classes("text-sm text-slate-500 dark:text-slate-400")
 
+        with ui.card().classes(
+            "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+        ):
+            with ui.row().classes("w-full items-center justify-between gap-3"):
+                ui.label("Alert Status").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                ui.label(alert_status.severity.upper()).classes(_alert_badge_classes(alert_status.severity))
+            ui.label(alert_status.message).classes("text-sm text-slate-600 dark:text-slate-300")
+            ui.label(
+                f"Warning at {alert_status.warning_threshold:.0%} · Critical at {alert_status.critical_threshold:.0%} · "
+                f"Email alerts {'enabled' if alert_status.email_alerts_enabled else 'disabled'}"
+            ).classes("text-sm text-slate-500 dark:text-slate-400")
+            if alert_status.history:
+                latest = alert_status.history[0]
+                ui.label(
+                    f"Latest alert logged {_format_timestamp(latest.updated_at)} at spot ${latest.spot_price:,.2f}"
+                ).classes("text-xs text-slate-500 dark:text-slate-400")
+
         with ui.grid(columns=4).classes("w-full gap-4 max-lg:grid-cols-2 max-sm:grid-cols-1"):
             summary_cards = [
                 (
@@ -129,17 +138,37 @@ async def overview_page() -> None:
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
-                ui.label("Strategy Snapshot").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
-                for strategy in strategy_catalog():
-                    with ui.row().classes(
-                        "w-full items-start justify-between gap-4 border-b border-slate-100 py-3 last:border-b-0 dark:border-slate-800"
-                    ):
-                        with ui.column().classes("gap-1"):
-                            ui.label(strategy["label"]).classes("font-semibold text-slate-900 dark:text-slate-100")
-                            ui.label(strategy["description"]).classes("text-sm text-slate-500 dark:text-slate-400")
-                        ui.label(f"${strategy['estimated_cost']:.2f}/oz").classes(
-                            "rounded-full bg-sky-100 px-3 py-1 text-xs font-semibold text-sky-700 dark:bg-sky-500/15 dark:text-sky-300"
-                        )
+                ui.label("Recent Alert History").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                if alert_status.history:
+                    for event in alert_status.history[:5]:
+                        with ui.row().classes(
+                            "w-full items-start justify-between gap-4 border-b border-slate-100 py-3 last:border-b-0 dark:border-slate-800"
+                        ):
+                            with ui.column().classes("gap-1"):
+                                ui.label(event.message).classes("text-sm font-medium text-slate-900 dark:text-slate-100")
+                                ui.label(
+                                    f"Logged {_format_timestamp(event.updated_at)} · Spot ${event.spot_price:,.2f} · LTV {event.ltv_ratio:.1%}"
+                                ).classes("text-xs text-slate-500 dark:text-slate-400")
+                            ui.label(event.severity.upper()).classes(_alert_badge_classes(event.severity))
+                else:
+                    ui.label("No alert history yet. Alerts will be logged once the warning threshold is crossed.").classes(
+                        "text-sm text-slate-500 dark:text-slate-400"
+                    )
+
+        with ui.card().classes(
+            "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+        ):
+            ui.label("Strategy Snapshot").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+            for strategy in strategy_catalog():
+                with ui.row().classes(
+                    "w-full items-start justify-between gap-4 border-b border-slate-100 py-3 last:border-b-0 dark:border-slate-800"
+                ):
+                    with ui.column().classes("gap-1"):
+                        ui.label(strategy["label"]).classes("font-semibold text-slate-900 dark:text-slate-100")
+                        ui.label(strategy["description"]).classes("text-sm text-slate-500 dark:text-slate-400")
+                    ui.label(f"${strategy['estimated_cost']:.2f}/oz").classes(
+                        "rounded-full bg-sky-100 px-3 py-1 text-xs font-semibold text-sky-700 dark:bg-sky-500/15 dark:text-sky-300"
+                    )
 
         ui.label("Quick Strategy Recommendations").classes("text-xl font-semibold text-slate-900 dark:text-slate-100")
         with ui.grid(columns=3).classes("w-full gap-4 max-lg:grid-cols-1"):
diff --git a/app/pages/settings.py b/app/pages/settings.py
index f9f7f69..b6f117d 100644
--- a/app/pages/settings.py
+++ b/app/pages/settings.py
@@ -4,6 +4,16 @@ from nicegui import ui
 
 from app.models.portfolio import PortfolioConfig, get_portfolio_repository
 from app.pages.common import dashboard_page
+from app.services.alerts import AlertService, build_portfolio_alert_context
+from app.services.settings_status import save_status_text
+
+
+def _alert_badge_classes(severity: str) -> str:
+    return {
+        "critical": "rounded-full bg-rose-100 px-3 py-1 text-xs font-semibold text-rose-700 dark:bg-rose-500/15 dark:text-rose-300",
+        "warning": "rounded-full bg-amber-100 px-3 py-1 text-xs font-semibold text-amber-700 dark:bg-amber-500/15 dark:text-amber-300",
+        "ok": "rounded-full bg-emerald-100 px-3 py-1 text-xs font-semibold text-emerald-700 dark:bg-emerald-500/15 dark:text-emerald-300",
+    }.get(severity, "rounded-full bg-slate-100 px-3 py-1 text-xs font-semibold text-slate-700")
 
 
 @ui.page("/settings")
@@ -11,6 +21,7 @@ def settings_page() -> None:
     """Settings page with persistent portfolio configuration."""
     repo = get_portfolio_repository()
     config = repo.load()
+    alert_service = AlertService()
 
     syncing_entry_basis = False
 
@@ -28,6 +39,24 @@ def settings_page() -> None:
             return 0.0
         return max(parsed, 0.0)
 
+    def build_preview_config() -> PortfolioConfig:
+        return PortfolioConfig(
+            gold_value=as_positive_float(gold_value.value),
+            entry_price=as_positive_float(entry_price.value),
+            gold_ounces=as_positive_float(gold_ounces.value),
+            entry_basis_mode=str(entry_basis_mode.value),
+            loan_amount=as_non_negative_float(loan_amount.value),
+            margin_threshold=float(margin_threshold.value),
+            monthly_budget=float(monthly_budget.value),
+            ltv_warning=float(ltv_warning.value),
+            primary_source=str(primary_source.value),
+            fallback_source=str(fallback_source.value),
+            refresh_interval=int(refresh_interval.value),
+            volatility_spike=float(vol_alert.value),
+            spot_drawdown=float(price_alert.value),
+            email_alerts=bool(email_alerts.value),
+        )
+
     with dashboard_page(
         "Settings",
         "Configure portfolio assumptions, collateral entry basis, preferred market data inputs, and alert thresholds.",
@@ -151,7 +180,21 @@ def settings_page() -> None:
                     step=0.5,
                 ).classes("w-full")
                 email_alerts = ui.switch("Email alerts", value=config.email_alerts)
+                ui.label("Defaults remain warn at 70% and critical at 75% unless you override them.").classes(
+                    "text-sm text-slate-500 dark:text-slate-400"
+                )
 
+            with ui.card().classes(
+                "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
+            ):
+                ui.label("Current Alert State").classes("text-lg font-semibold text-slate-900 dark:text-slate-100")
+                with ui.row().classes("w-full items-center justify-between gap-3"):
+                    alert_state_container = ui.row().classes("items-center")
+                    email_state_label = ui.label().classes("text-xs text-slate-500 dark:text-slate-400")
+                alert_message = ui.label().classes("text-sm text-slate-600 dark:text-slate-300")
+                alert_history_column = ui.column().classes("w-full gap-2")
+
+        with ui.row().classes("w-full gap-6 max-lg:flex-col"):
             with ui.card().classes(
                 "w-full rounded-2xl border border-slate-200 bg-white shadow-sm dark:border-slate-800 dark:bg-slate-900"
             ):
@@ -173,6 +216,52 @@ def settings_page() -> None:
                 gold_value.props(remove="readonly")
                 derived_hint.set_text("Start value is the editable basis; gold weight is derived from start value ÷ entry price.")
 
+        def render_alert_state() -> None:
+            try:
+                preview_config = build_preview_config()
+                alert_status = alert_service.evaluate(
+                    preview_config,
+                    build_portfolio_alert_context(
+                        preview_config,
+                        spot_price=float(preview_config.entry_price or 0.0),
+                        source="settings-preview",
+                        updated_at="",
+                    ),
+                    persist=False,
+                )
+                alert_state_container.clear()
+                with alert_state_container:
+                    ui.label(alert_status.severity.upper()).classes(_alert_badge_classes(alert_status.severity))
+                email_state_label.set_text(
+                    f"Email alerts {'enabled' if alert_status.email_alerts_enabled else 'disabled'} · Warning {alert_status.warning_threshold:.0%} · Critical {alert_status.critical_threshold:.0%}"
+                )
+                alert_message.set_text(alert_status.message)
+                alert_history_column.clear()
+                if alert_status.history:
+                    for event in alert_status.history[:5]:
+                        with alert_history_column:
+                            with ui.row().classes(
+                                "w-full items-start justify-between gap-3 rounded-lg bg-slate-50 p-3 dark:bg-slate-800"
+                            ):
+                                with ui.column().classes("gap-1"):
+                                    ui.label(event.message).classes(
+                                        "text-sm font-medium text-slate-900 dark:text-slate-100"
+                                    )
+                                    ui.label(
+                                        f"Spot ${event.spot_price:,.2f} · LTV {event.ltv_ratio:.1%}"
+                                    ).classes("text-xs text-slate-500 dark:text-slate-400")
+                                ui.label(event.severity.upper()).classes(_alert_badge_classes(event.severity))
+                else:
+                    with alert_history_column:
+                        ui.label("No alert history yet.").classes("text-sm text-slate-500 dark:text-slate-400")
+            except ValueError as exc:
+                alert_state_container.clear()
+                with alert_state_container:
+                    ui.label("INVALID").classes(_alert_badge_classes("critical"))
+                email_state_label.set_text("Fix validation errors to preview alert state")
+                alert_message.set_text(str(exc))
+                alert_history_column.clear()
+
         def update_entry_basis(*_args: object) -> None:
             nonlocal syncing_entry_basis
             apply_entry_basis_mode()
@@ -224,9 +313,11 @@ def settings_page() -> None:
             else:
                 margin_price_display.set_text("—")
 
+            render_alert_state()
+
         for element in (entry_basis_mode, entry_price, gold_value, gold_ounces):
             element.on_value_change(update_entry_basis)
-        for element in (loan_amount, margin_threshold):
+        for element in (loan_amount, margin_threshold, ltv_warning, email_alerts):
             element.on_value_change(update_calculations)
 
         apply_entry_basis_mode()
@@ -234,30 +325,11 @@ def settings_page() -> None:
 
         def save_settings() -> None:
             try:
-                new_config = PortfolioConfig(
-                    gold_value=as_positive_float(gold_value.value),
-                    entry_price=as_positive_float(entry_price.value),
-                    gold_ounces=as_positive_float(gold_ounces.value),
-                    entry_basis_mode=str(entry_basis_mode.value),
-                    loan_amount=as_non_negative_float(loan_amount.value),
-                    margin_threshold=float(margin_threshold.value),
-                    monthly_budget=float(monthly_budget.value),
-                    ltv_warning=float(ltv_warning.value),
-                    primary_source=str(primary_source.value),
-                    fallback_source=str(fallback_source.value),
-                    refresh_interval=int(refresh_interval.value),
-                    volatility_spike=float(vol_alert.value),
-                    spot_drawdown=float(price_alert.value),
-                    email_alerts=bool(email_alerts.value),
-                )
-
+                new_config = build_preview_config()
                 repo.save(new_config)
+                render_alert_state()
 
-                status.set_text(
-                    f"Saved: basis={new_config.entry_basis_mode}, start=${new_config.gold_value:,.0f}, "
-                    f"entry=${new_config.entry_price:,.2f}/oz, weight={new_config.gold_ounces:,.2f} oz, "
-                    f"LTV={new_config.current_ltv:.1%}, trigger=${new_config.margin_call_price:,.2f}/oz"
-                )
+                status.set_text(save_status_text(new_config))
                 ui.notify("Settings saved successfully", color="positive")
             except ValueError as e:
                 ui.notify(f"Validation error: {e}", color="negative")
diff --git a/app/services/alerts.py b/app/services/alerts.py
new file mode 100644
index 0000000..394adbf
--- /dev/null
+++ b/app/services/alerts.py
@@ -0,0 +1,101 @@
+"""Alert evaluation and history persistence."""
+
+from __future__ import annotations
+
+from typing import Mapping
+
+from app.models.alerts import AlertEvent, AlertHistoryRepository, AlertStatus
+from app.models.portfolio import PortfolioConfig
+
+
+def build_portfolio_alert_context(
+    config: PortfolioConfig,
+    *,
+    spot_price: float,
+    source: str,
+    updated_at: str,
+) -> dict[str, float | str]:
+    gold_units = float(config.gold_ounces or 0.0)
+    live_gold_value = gold_units * spot_price
+    loan_amount = float(config.loan_amount)
+    margin_call_ltv = float(config.margin_threshold)
+    return {
+        "spot_price": float(spot_price),
+        "gold_units": gold_units,
+        "gold_value": live_gold_value,
+        "loan_amount": loan_amount,
+        "ltv_ratio": loan_amount / live_gold_value if live_gold_value > 0 else 0.0,
+        "net_equity": live_gold_value - loan_amount,
+        "margin_call_ltv": margin_call_ltv,
+        "margin_call_price": loan_amount / (margin_call_ltv * gold_units) if gold_units > 0 else 0.0,
+        "quote_source": source,
+        "quote_updated_at": updated_at,
+    }
+
+
+class AlertService:
+    def __init__(self, history_path=None) -> None:
+        self.repository = AlertHistoryRepository(history_path=history_path)
+
+    def evaluate(
+        self, config: PortfolioConfig, portfolio: Mapping[str, object], *, persist: bool = True
+    ) -> AlertStatus:
+        history = self.repository.load() if persist else []
+        ltv_ratio = float(portfolio.get("ltv_ratio", 0.0))
+        spot_price = float(portfolio.get("spot_price", 0.0))
+        updated_at = str(portfolio.get("quote_updated_at", ""))
+
+        if ltv_ratio >= float(config.margin_threshold):
+            severity = "critical"
+            message = (
+                f"Current LTV {ltv_ratio:.1%} is above the critical threshold of "
+                f"{float(config.margin_threshold):.1%}."
+            )
+        elif ltv_ratio >= float(config.ltv_warning):
+            severity = "warning"
+            message = (
+                f"Current LTV {ltv_ratio:.1%} is above the warning threshold of " f"{float(config.ltv_warning):.1%}."
+            )
+        else:
+            severity = "ok"
+            message = "LTV is within configured thresholds."
+
+        preview_history: list[AlertEvent] = []
+        if severity != "ok":
+            event = AlertEvent(
+                severity=severity,
+                message=message,
+                ltv_ratio=ltv_ratio,
+                warning_threshold=float(config.ltv_warning),
+                critical_threshold=float(config.margin_threshold),
+                spot_price=spot_price,
+                updated_at=updated_at,
+                email_alerts_enabled=bool(config.email_alerts),
+            )
+            if persist:
+                if self._should_record(history, event):
+                    history.append(event)
+                    self.repository.save(history)
+            else:
+                preview_history = [event]
+
+        return AlertStatus(
+            severity=severity,
+            message=message,
+            ltv_ratio=ltv_ratio,
+            warning_threshold=float(config.ltv_warning),
+            critical_threshold=float(config.margin_threshold),
+            email_alerts_enabled=bool(config.email_alerts),
+            history=(
+                preview_history
+                if not persist
+                else list(reversed(self.repository.load() if severity != "ok" else history))
+            ),
+        )
+
+    @staticmethod
+    def _should_record(history: list[AlertEvent], event: AlertEvent) -> bool:
+        if not history:
+            return True
+        latest = history[-1]
+        return latest.severity != event.severity
diff --git a/app/services/settings_status.py b/app/services/settings_status.py
new file mode 100644
index 0000000..2f972ef
--- /dev/null
+++ b/app/services/settings_status.py
@@ -0,0 +1,27 @@
+from __future__ import annotations
+
+from typing import Protocol
+
+from app.models.portfolio import PortfolioConfig
+
+
+class _SaveStatusConfig(Protocol):
+    entry_basis_mode: str
+    gold_value: float | None
+    entry_price: float | None
+    gold_ounces: float | None
+    current_ltv: float
+    margin_call_price: object
+
+
+def margin_call_price_value(config: PortfolioConfig | _SaveStatusConfig) -> float:
+    margin_call_price = config.margin_call_price
+    return float(margin_call_price() if callable(margin_call_price) else margin_call_price)
+
+
+def save_status_text(config: PortfolioConfig | _SaveStatusConfig) -> str:
+    return (
+        f"Saved: basis={config.entry_basis_mode}, start=${config.gold_value:,.0f}, "
+        f"entry=${config.entry_price:,.2f}/oz, weight={config.gold_ounces:,.2f} oz, "
+        f"LTV={config.current_ltv:.1%}, trigger=${margin_call_price_value(config):,.2f}/oz"
+    )
diff --git a/tests/test_alerts.py b/tests/test_alerts.py
new file mode 100644
index 0000000..d726d6d
--- /dev/null
+++ b/tests/test_alerts.py
@@ -0,0 +1,140 @@
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from app.models.portfolio import PortfolioConfig
+from app.services.alerts import AlertService, build_portfolio_alert_context
+
+
+@pytest.fixture
+def alert_service(tmp_path: Path) -> AlertService:
+    return AlertService(history_path=tmp_path / "alert_history.json")
+
+
+def test_alert_service_reports_ok_when_ltv_is_below_warning(alert_service: AlertService) -> None:
+    config = PortfolioConfig(gold_value=215_000.0, entry_price=215.0, loan_amount=120_000.0)
+    portfolio = build_portfolio_alert_context(
+        config, spot_price=215.0, source="test", updated_at="2026-03-24T12:00:00Z"
+    )
+
+    status = alert_service.evaluate(config, portfolio)
+
+    assert status.severity == "ok"
+    assert status.message == "LTV is within configured thresholds."
+    assert status.history == []
+
+
+def test_alert_service_preview_does_not_persist_history(alert_service: AlertService) -> None:
+    config = PortfolioConfig(
+        gold_value=215_000.0,
+        entry_price=215.0,
+        loan_amount=151_000.0,
+        ltv_warning=0.70,
+        margin_threshold=0.75,
+    )
+    portfolio = build_portfolio_alert_context(config, spot_price=215.0, source="settings-preview", updated_at="")
+
+    preview_status = alert_service.evaluate(config, portfolio, persist=False)
+
+    assert preview_status.severity == "warning"
+    assert [event.severity for event in preview_status.history] == ["warning"]
+    assert alert_service.repository.load() == []
+
+    persisted_status = alert_service.evaluate(config, portfolio)
+
+    assert [event.severity for event in persisted_status.history] == ["warning"]
+    assert len(alert_service.repository.load()) == 1
+
+
+def test_alert_service_logs_warning_once_when_warning_threshold_is_crossed(alert_service: AlertService) -> None:
+    config = PortfolioConfig(
+        gold_value=215_000.0,
+        entry_price=215.0,
+        loan_amount=151_000.0,
+        ltv_warning=0.70,
+        margin_threshold=0.75,
+        email_alerts=True,
+    )
+    portfolio = build_portfolio_alert_context(
+        config, spot_price=215.0, source="test", updated_at="2026-03-24T12:00:00Z"
+    )
+
+    first_status = alert_service.evaluate(config, portfolio)
+    second_status = alert_service.evaluate(config, portfolio)
+
+    assert first_status.severity == "warning"
+    assert first_status.email_alerts_enabled is True
+    assert len(first_status.history) == 1
+    assert first_status.history[0].severity == "warning"
+    assert "70.2%" in first_status.history[0].message
+    assert len(second_status.history) == 1
+
+
+def test_alert_service_escalates_to_critical_and_keeps_history(alert_service: AlertService) -> None:
+    config = PortfolioConfig(
+        gold_value=215_000.0,
+        entry_price=215.0,
+        loan_amount=150_500.0,
+        ltv_warning=0.70,
+        margin_threshold=0.75,
+    )
+
+    warning_portfolio = build_portfolio_alert_context(
+        config,
+        spot_price=215.0,
+        source="test",
+        updated_at="2026-03-24T12:00:00Z",
+    )
+    critical_portfolio = build_portfolio_alert_context(
+        config,
+        spot_price=200.0,
+        source="test",
+        updated_at="2026-03-24T13:00:00Z",
+    )
+
+    alert_service.evaluate(config, warning_portfolio)
+    critical_status = alert_service.evaluate(config, critical_portfolio)
+
+    assert critical_status.severity == "critical"
+    assert "above the critical threshold" in critical_status.message
+    assert [event.severity for event in critical_status.history] == ["critical", "warning"]
+    assert critical_status.history[0].ltv_ratio == pytest.approx(0.7525, rel=1e-6)
+
+
+def test_alert_service_preserves_persisted_history_during_ok_evaluation(alert_service: AlertService) -> None:
+    warning_config = PortfolioConfig(
+        gold_value=215_000.0,
+        entry_price=215.0,
+        loan_amount=151_000.0,
+        ltv_warning=0.70,
+        margin_threshold=0.75,
+    )
+    ok_config = PortfolioConfig(
+        gold_value=215_000.0,
+        entry_price=215.0,
+        loan_amount=120_000.0,
+        ltv_warning=0.70,
+        margin_threshold=0.75,
+    )
+
+    warning_portfolio = build_portfolio_alert_context(
+        warning_config,
+        spot_price=215.0,
+        source="test",
+        updated_at="2026-03-24T12:00:00Z",
+    )
+    ok_portfolio = build_portfolio_alert_context(
+        ok_config,
+        spot_price=215.0,
+        source="test",
+        updated_at="2026-03-24T13:00:00Z",
+    )
+
+    alert_service.evaluate(warning_config, warning_portfolio)
+    ok_status = alert_service.evaluate(ok_config, ok_portfolio)
+
+    assert ok_status.severity == "ok"
+    assert [event.severity for event in ok_status.history] == ["warning"]
+    assert len(alert_service.repository.load()) == 1
diff --git a/tests/test_e2e_playwright.py b/tests/test_e2e_playwright.py
index 288a44b..051accc 100644
--- a/tests/test_e2e_playwright.py
+++ b/tests/test_e2e_playwright.py
@@ -19,6 +19,7 @@ def test_homepage_and_options_page_render() -> None:
         expect(page.locator("text=Vault Dashboard").first).to_be_visible(timeout=10000)
         expect(page.locator("text=Overview").first).to_be_visible(timeout=10000)
         expect(page.locator("text=Live quote source:").first).to_be_visible(timeout=15000)
+        expect(page.locator("text=Alert Status").first).to_be_visible(timeout=15000)
         page.screenshot(path=str(ARTIFACTS / "overview.png"), full_page=True)
 
         page.goto(f"{BASE_URL}/options", wait_until="domcontentloaded", timeout=30000)
diff --git a/tests/test_settings.py b/tests/test_settings.py
new file mode 100644
index 0000000..e4ead60
--- /dev/null
+++ b/tests/test_settings.py
@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+from app.models.portfolio import PortfolioConfig
+from app.services.settings_status import save_status_text
+
+
+class CallableMarginCallPriceConfig:
+    def __init__(self, config: PortfolioConfig) -> None:
+        self.entry_basis_mode = config.entry_basis_mode
+        self.gold_value = config.gold_value
+        self.entry_price = config.entry_price
+        self.gold_ounces = config.gold_ounces
+        self.current_ltv = config.current_ltv
+        self._margin_call_price = config.margin_call_price
+
+    def margin_call_price(self) -> float:
+        return self._margin_call_price
+
+
+def test_save_status_text_uses_margin_call_price_api() -> None:
+    config = PortfolioConfig(gold_value=215_000.0, entry_price=215.0, loan_amount=145_000.0)
+
+    status = save_status_text(CallableMarginCallPriceConfig(config))
+
+    assert "Saved: basis=value_price" in status
+    assert "start=$215,000" in status
+    assert "entry=$215.00/oz" in status
+    assert "weight=1,000.00 oz" in status
+    assert "LTV=67.4%" in status
+    assert "trigger=$193.33/oz" in status