Reconstruct TopstepX MLL floors from the EOD balance curve

TopstepX never reports the Maximum Loss Limit, but it's deterministic:
floor = min(0, eodBalanceHigh − trailingDrawdown), locking at the $0
starting balance. The EOD curve rebuilds from daily P&L + fund events,
with off-book fee drift spread across days proportionally to reported
fees (validated against a platform-reported MLL to ~$0.10). Stored in
autoLiqThresholds — negative, or +$0.01 once locked — so dead detection,
dashboards, and the ruin model's startThreshold all use the real room.
Guards move from '> 0' to '!== 0'; 0 still means no floor. canTrade=false
accounts are skipped. daily_pnl gains a fees column for the weighting.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

app/accounts/[id]/page.tsx

@@ -411,9 +411,11 @@ export default function AccountPage() {
 
     const hasLossLimit = cfg != null && cfg.minDayPnL !== -999;
     const daysPassed   = cfg != null && account.daysTraded >= cfg.minTradingDays;
-    // Dead when balance hits Tradovate's auto-liquidation floor
-    const isDead   = account.autoLiqThreshold > 0 && account.amount <= account.autoLiqThreshold;
-    const liqFloor = account.autoLiqThreshold > 0 ? account.autoLiqThreshold : null;
+    // Dead when balance hits the liquidation floor — Tradovate reports its
+    // (positive) floor; TopstepX floors are reconstructed MLLs, negative or
+    // +$0.01 once locked at breakeven. 0 = no floor known.
+    const isDead   = account.autoLiqThreshold !== 0 && account.amount <= account.autoLiqThreshold;
+    const liqFloor = account.autoLiqThreshold !== 0 ? account.autoLiqThreshold : null;
 
     // Ground-truth profit = balance minus funded account size.
     // Falls back to FIFO total when accountSize is unavailable.
@@ -508,8 +510,9 @@ export default function AccountPage() {
             drawdown: (cfg.trailingDrawdown ?? 0) > 0
                 ? cfg.trailingDrawdown!
                 : Math.abs(cfg.maxLoss) > 0 ? Math.abs(cfg.maxLoss) : 2000,
-            // The platform's real liquidation floor, when it reports one.
-            startThreshold: account.autoLiqThreshold > 0
+            // The platform's real liquidation floor, when one is known —
+            // reported by Tradovate, reconstructed for TopstepX.
+            startThreshold: account.autoLiqThreshold !== 0
                 ? Math.round((account.autoLiqThreshold - cfg.accountSize) * 100) / 100
                 : undefined,
         },

app/api/state/route.ts

@@ -45,7 +45,8 @@ export async function GET() {
                 const dailyPnL = combined.dailyPnL;
                 const totalProfit = dailyPnL.reduce((sum, d) => sum + d.pnl, 0);
                 const autoLiqThreshold = client.autoLiqThresholds[acc.id] ?? 0;
-                const isDead = autoLiqThreshold > 0 && cash.amount <= autoLiqThreshold;
+                // 0 = no floor; negative floors are reconstructed TopstepX MLLs.
+                const isDead = autoLiqThreshold !== 0 && cash.amount <= autoLiqThreshold;
                 const allFundTxns = client.fundTransactions?.[acc.id] ?? [];
                 const priorProfit = client.priorProfit?.[acc.id] ?? 0;
                 // Stage = 1 + number of withdrawals (negative fund transactions)

app/page.tsx

@@ -24,7 +24,8 @@ function fmt(value: number) {
 
 /** Returns true when an account's balance has breached Tradovate's auto-liquidation floor. */
 function isAccountDead(account: AccountState): boolean {
-    return account.autoLiqThreshold > 0 && account.amount <= account.autoLiqThreshold;
+    // 0 = no floor; negative floors are reconstructed TopstepX MLLs.
+    return account.autoLiqThreshold !== 0 && account.amount <= account.autoLiqThreshold;
 }
 
 function SettingsIcon() {