Fix RSI sell logic, add crossover detection, improve VIX fallback, and add position recovery on restart

alpaca_trader/config.json

@@ -43,5 +43,9 @@
     "PULLBACK_PERCENTAGE": 0.382,
     "ENABLE_SHORT_SELLING": true,
     "RSI_BUY_MAX": 55,
-    "RSI_SELL_MIN": 30
+    "RSI_SELL_MIN": 45,
+    "RSI_RANGE_OVERSOLD": 30,
+    "RSI_RANGE_OVERBOUGHT": 70,
+    "REQUIRE_MA_CROSSOVER": false,
+    "CROSSOVER_LOOKBACK": 5
 }