Feat: Add Don't Doubt Bull strategy

lib/strategies/dont-doubt-bull.js

@@ -0,0 +1,50 @@
+import { BaseStrategy } from './base.js';
+
+export class DontDoubtBullStrategy extends BaseStrategy {
+  constructor(config = {}) {
+    super('dont-doubt-bull', {
+      minYesPct: config.minYesPct || 30,
+      maxYesPct: config.maxYesPct || 40,
+      betSize: config.betSize || 2,
+      cooldownMs: config.cooldownMs || 60000,
+      ...config
+    });
+    
+    this.lastTradeTime = 0;
+    this.lastTradeTicker = null;
+  }
+
+  evaluate(state) {
+    if (!state || !this.enabled || !state.closeTime) return null;
+
+    const now = Date.now();
+    if (now - this.lastTradeTime < this.config.cooldownMs) return null;
+    if (state.ticker === this.lastTradeTicker) return null;
+
+    // 15 minute market total. First 1-5 minutes means 10 to 14 mins left.
+    const timeLeftMs = new Date(state.closeTime).getTime() - now;
+    const minsLeft = timeLeftMs / 60000;
+
+    if (minsLeft > 14 || minsLeft < 10) return null; // Outside our time window
+
+    const { yesPct } = state;
+
+    // Buy Yes if it's struggling early on
+    if (yesPct >= this.config.minYesPct && yesPct <= this.config.maxYesPct) {
+      const signal = {
+        strategy: this.name,
+        side: 'yes',
+        price: yesPct,
+        size: this.config.betSize,
+        reason: `Early Bullish Dip: ${minsLeft.toFixed(1)}m left, Yes @ ${yesPct}¢`,
+        ticker: state.ticker
+      };
+
+      this.lastTradeTime = now;
+      this.lastTradeTicker = state.ticker;
+      return signal;
+    }
+
+    return null;
+  }
+}