cci 수정

frontend/src/utils/customIndicators.ts

@@ -10,7 +10,11 @@ function sma(values: number[], period: number): number[] {
   return values.map((_, i) => {
     if (i < period - 1) return NaN;
     let sum = 0;
-    for (let j = i - period + 1; j <= i; j++) sum += values[j];
+    for (let j = i - period + 1; j <= i; j++) {
+      const v = values[j];
+      if (!Number.isFinite(v)) return NaN;
+      sum += v;
+    }
     return sum / period;
   });
 }
@@ -252,7 +256,7 @@ export function calcRSI(
 /**
  * CCI + 신호선 (업비트·TradingView)
  * CCI = (src - SMA(src,N)) / (0.015 × MeanDeviation)
- * 신호선 = CCI의 SMA/EMA/WMA (기본 SMA 10)
+ * src 기본 hlc3(고저종 평균), 신호선 = CCI의 SMA/EMA/WMA (기본 SMA 10)
  */
 export function calcCCI(
   bars: OHLCVBar[],
@@ -262,7 +266,7 @@ export function calcCCI(
   const maLen = Math.max(1, Number(params.maLength ?? 10) || 10);
   const rawMa = String(params.maType ?? 'SMA');
   const maType = rawMa === 'EMA' || rawMa === 'WMA' ? rawMa : (rawMa === 'None' ? 'None' : 'SMA');
-  const srcKey = String(params.src ?? 'close');
+  const srcKey = String(params.src ?? 'hlc3');
   const prices = bars.map(b => sourceAt(b, srcKey));
 
   const cci = prices.map((_, i) => {