feat(mse): auto pivot-based support/resistance lines on chart

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/web/bot.html

@@ -532,10 +532,84 @@ async function loadKlines() {
       document.getElementById('ohlc-l').textContent = fmt(last.low);
       document.getElementById('ohlc-c').textContent = fmt(last.close);
     }
+    drawSupportResistance(candles);
     updateChartOverlays();
   } catch(e) {}
 }
 
+// ── Support / Resistance ──────────────────────────
+let srLines = [];
+
+function drawSupportResistance(candles) {
+  // önceki çizgileri temizle
+  srLines.forEach(l => candleSeries.removePriceLine(l));
+  srLines = [];
+
+  if (candles.length < 10) return;
+
+  const left = 5, right = 5; // her yönde kaç mum komşu bakılacak
+  const pivotHighs = [], pivotLows = [];
+
+  for (let i = left; i < candles.length - right; i++) {
+    const c = candles[i];
+    let isHigh = true, isLow = true;
+    for (let j = i - left; j <= i + right; j++) {
+      if (j === i) continue;
+      if (candles[j].high >= c.high) isHigh = false;
+      if (candles[j].low  <= c.low)  isLow  = false;
+    }
+    if (isHigh) pivotHighs.push(c.high);
+    if (isLow)  pivotLows.push(c.low);
+  }
+
+  // yakın seviyeleri cluster'la: fiyat aralığının %0.3'ü içindeki pivotları birleştir
+  const currentPrice = candles[candles.length - 1].close;
+  const threshold = currentPrice * 0.003;
+
+  function cluster(pivots) {
+    const sorted = [...pivots].sort((a, b) => a - b);
+    const groups = [];
+    for (const p of sorted) {
+      const last = groups[groups.length - 1];
+      if (last && p - last[last.length - 1] <= threshold) {
+        last.push(p);
+      } else {
+        groups.push([p]);
+      }
+    }
+    // her grubun ortalamasını al, en az 2 pivot olan seviyeleri döndür
+    return groups
+      .filter(g => g.length >= 2)
+      .map(g => g.reduce((s, v) => s + v, 0) / g.length);
+  }
+
+  const resistances = cluster(pivotHighs);
+  const supports    = cluster(pivotLows);
+
+  // mevcut fiyata yakın en fazla 4 direnç + 4 destek çiz
+  const near = levels => levels
+    .map(p => ({ p, dist: Math.abs(p - currentPrice) }))
+    .sort((a, b) => a.dist - b.dist)
+    .slice(0, 4)
+    .map(x => x.p);
+
+  near(resistances).forEach(price => {
+    srLines.push(candleSeries.createPriceLine({
+      price, color: 'rgba(231,76,60,0.55)', lineWidth: 1,
+      lineStyle: LightweightCharts.LineStyle.Dashed,
+      axisLabelVisible: false, title: 'R',
+    }));
+  });
+
+  near(supports).forEach(price => {
+    srLines.push(candleSeries.createPriceLine({
+      price, color: 'rgba(46,204,113,0.55)', lineWidth: 1,
+      lineStyle: LightweightCharts.LineStyle.Dashed,
+      axisLabelVisible: false, title: 'S',
+    }));
+  });
+}
+
 let klineWs = null;
 function startKlineWs() {
   if (klineWs) klineWs.close();