Refine strategy simulation with pyramiding, partial exits, and fixed marker logic

- Implement position pyramiding and 15% partial profit-taking
- Add mutual exclusion between entry and exit in the same candle
- Optimize simulation to use cached indicator results
- Revert Hurst Bands signal logic to cross-down (dip entry)
- Add safety filter for chart markers to prevent rendering errors

src/api/dashboard/static/js/indicators/hurst.js

@@ -70,21 +70,21 @@ function calculateHurstSignal(indicator, lastCandle, prevCandle, values, prevVal
         return null;
     }
     
-    // BUY: Price crosses DOWN through lower Hurst Band
+    // BUY: Price crosses DOWN through lower Hurst Band (dip entry)
     if (prevClose > prevLower && close <= lower) {
         return {
             type: 'buy',
-            strength: 75,
+            strength: 80,
             value: close,
             reasoning: `Price crossed DOWN through lower Hurst Band`
         };
     }
     
-    // SELL: Price crosses DOWN through upper Hurst Band (reversal from top)
+    // SELL: Price crosses DOWN through upper Hurst Band (reversal entry)
     if (prevClose > prevUpper && close <= upper) {
         return {
             type: 'sell',
-            strength: 75,
+            strength: 80,
             value: close,
             reasoning: `Price crossed DOWN through upper Hurst Band`
         };