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Crypto SMC Signal Bot — runs every 15 minutes\n// Fetch: 4H/1H/15M/5M candles → SMC structure analysis → Telegram signal on strict OB retest\nimport { blob } from \"https://esm.town/v/std/blob/main.ts\";\n\nconst SYMBOLS = [\"BTCUSDT\", \"ETHUSDT\", \"SOLUSDT\", \"XAUUSDT\", \"EURUSDT\"];\nconst BINANCE = \"https://api.binance.com/api/v3/klines\";\nconst BOT_TOKEN = Deno.env.get(\"TELEGRAM_BOT_TOKEN\") ?? \"\";\nconst CHAT_ID = Deno.env.get(\"TELEGRAM_CHAT_ID\") ?? \"\";\n\n// ---- Helpers ----\nasync function candles(symbol: string, interval: string, limit = 200) {\n const url = `${BINANCE}?symbol=${symbol}&interval=${interval}&limit=${limit}`;\n const r = await fetch(url);\n if (!r.ok) throw new Error(`${symbol} ${interval}: HTTP ${r.status}`);\n const json = await r.json();\n return json.map((k: number[]) => ({\n time: k[0], open: +k[1], high: +k[2], low: +k[3], close: +k[4],\n volume: +k[5], isClosed: k[6] !== 0,\n }));\n}\n\nfunction ema(vals: number[], period: number): number {\n const k = 2 / (period + 1);\n let e = vals[0];\n for (let i = 1; i < vals.length; i++) e = vals[i] * k + e * (1 - k);\n return e;\n}\n\n// Find the most recent, most significant clean order block (last down-move body before an up swing)\nfunction orderBlock(c: any[]): { kind: \"bullish\" | \"bearish\"; zone: [number, number]; price: number } | null {\n if (c.length < 50) return null;\n const price = c[c.length - 1].close;\n const swingHigh = (i: number) => c[i].high > (c[i - 1]?.high ?? 0) && c[i].high > (c[i + 1]?.high ?? 0);\n const swingLow = (i: number) => c[i].low < (c[i - 1]?.low ?? 0) && c[i].low < (c[i + 1]?.low ?? 0);\n for (let i = c.length - 3; i > 5; i--) {\n if (swingLow(i) || swingHigh(i)) continue;\n const prev = c[i - 1], candle = c[i];\n // Bullish OB: a big bearish candle that precedes a swing low → price retraces and retests its body\n if (candle.close < candle.open && prev.close < prev.open && candle.close < prev.low) {\n // confirm a swing low formed right after\n if (swingLow(i + 2) || swingLow(i + 3)) {\n const zone: [number, number] = [Math.min(candle.open, candle.close), Math.max(candle.open, candle.close)];\n // strict: price is now retesting the zone from above, zone not yet broken\n if (price > zone[0] && price - zone[0] < (price * 0.002)) {\n return { kind: \"bullish\", zone, price };\n }\n }\n }\n // Bearish OB: a big bullish candle that precedes a swing high → retest from below\n if (candle.close > candle.open && prev.close > prev.open && candle.close > prev.high) {\n if (swingHigh(i + 2) || swingHigh(i + 3)) {\n const zone: [number, number] = [Math.min(candle.open, candle.close), Math.max(candle.open, candle.close)];\n if (price < zone[1] && zone[1] - price < (price * 0.002)) {\n return { kind: \"bearish\", zone, price };\n }\n }\n }\n }\n return null;\n}\n\nasync function analyze(symbol: string): Promise {\n const [h4, h1, m15, m5] = await Promise.all([\n candles(symbol, \"4h\"), candles(symbol, \"1h\"),\n candles(symbol, \"15m\"), candles(symbol, \"5m\"),\n ]);\n\n const last = m5[m5.length - 1];\n if (!last?.isClosed) return null;\n\n const h4Closes = h4.map((c) => c.close);\n const emaFast = ema(h4Closes, 21), emaSlow = ema(h4Closes, 50);\n const trendLong = emaFast > emaSlow ? \"bullish\" : \"bearish\";\n\n // Aligned multi-timeframe structure: 4H trend + 1H OB + 15M/5M agreement\n const ob = orderBlock(h1);\n if (!ob) return null;\n if (ob.kind !== trendLong) return null; // strict: 4H trend must match the OB direction\n\n const m15Ob = orderBlock(m15);\n const m5Ob = orderBlock(m5);\n if (!m15Ob || !m5Ob) return null;\n if (![m15Ob.kind, m5Ob.kind].every((k) => k === ob.kind)) return null;\n\n // Build the trade\n const entry = ob.kind === \"bullish\"\n ? ob.zone[1] - (ob.zone[1] - ob.zone[0]) * 0.2\n : ob.zone[0] + (ob.zone[1] - ob.zone[0]) * 0.2;\n const rr = 3; // risk:reward 1:3\n const sl = ob.kind === \"bullish\" ? zoneLow(ob.zone, 0.997) : zoneHigh(ob.zone, 1.003);\n const tp = ob.kind === \"bullish\" ? entry + (entry - (sl as number)) * rr : entry - ((sl as number) - entry) * rr;\n const pct = Math.abs((tp - entry) / entry) * 100;\n\n return {\n symbol, side: ob.kind.toUpperCase() === \"BULLISH\" ? \"BUY\" : \"SELL\",\n trend: trendLong, entry: entry.toFixed(2), sl: (sl as number).toFixed(2),\n tp: tp.toFixed(2), pct: pct.toFixed(1),\n };\n}\n\nfunction zoneLow(z: [number, number], f: number) { return z[0] * f; }\nfunction zoneHigh(z: [number, number], f: number) { return z[1] * f; }\n\n// ---- Telegram ----\nasync function sendTelegram(sig: any) {\n const arrow = sig.side === \"BUY\" ? \"🟢\" : \"🔴\";\n const text =\n `🎯 *Smart Money Signal* — ${sig.symbol}\\n\\n` +\n `${arrow} *Direction:* ${sig.side}\\n` +\n `📊 *HTF Trend (4H):* ${sig.trend}\\n\\n` +\n `💹 *Entry:* \\`${sig.entry}\\`\\n` +\n `🛡 *Stop Loss:* \\`${sig.sl}\\`\\n` +\n `✅ *Take Profit:* \\`${sig.tp}\\`\\n` +\n `💰 *Predicted Profit:* ${sig.pct}%\\n\\n` +\n `⚡ Order-block retest confirmed on 4H/1H/15M/5M | RR 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Diff · v1