feat(trade-monitor): 순수 지표 모듈 (sma/rsi/highest_high)

services/trade-monitor/indicators.py

@@ -0,0 +1,38 @@
+"""순수 TA 지표 — sma / rsi_series / highest_high."""
+from __future__ import annotations
+
+
+def sma(values: list[float], period: int) -> float | None:
+    if period <= 0 or len(values) < period:
+        return None
+    return sum(values[-period:]) / period
+
+
+def highest_high(highs: list[float], period: int) -> float | None:
+    if period <= 0 or len(highs) < period:
+        return None
+    return max(highs[-period:])
+
+
+def rsi_series(closes: list[float], period: int = 14) -> list[float]:
+    """Wilder RSI. 반환 리스트는 closes[period:]에 1:1 정렬. 부족하면 []."""
+    if len(closes) <= period:
+        return []
+    deltas = [closes[i] - closes[i - 1] for i in range(1, len(closes))]
+    gains = [d if d > 0 else 0.0 for d in deltas]
+    losses = [-d if d < 0 else 0.0 for d in deltas]
+
+    def _rsi(ag: float, al: float) -> float:
+        if al == 0:
+            return 100.0
+        rs = ag / al
+        return 100.0 - 100.0 / (1.0 + rs)
+
+    avg_gain = sum(gains[:period]) / period
+    avg_loss = sum(losses[:period]) / period
+    out = [_rsi(avg_gain, avg_loss)]
+    for i in range(period, len(deltas)):
+        avg_gain = (avg_gain * (period - 1) + gains[i]) / period
+        avg_loss = (avg_loss * (period - 1) + losses[i]) / period
+        out.append(_rsi(avg_gain, avg_loss))
+    return out