diff --git a/__tests__/Tickdata.test.ts b/__tests__/Tickdata.test.ts
index e9d66f6..e0b5ca2 100644
--- a/__tests__/Tickdata.test.ts
+++ b/__tests__/Tickdata.test.ts
@@ -390,7 +390,7 @@ test("Trades convert to Candlestick", () => {
     high: 0.00224,
     low: 0.00224,
     close: 0.00224,
-    volume: 8916,
+    volume: 4458,
   });
 
   // 27 candles, without open (unfinished) candle
@@ -415,7 +415,7 @@ test("Trades convert to Candlestick, with filter", () => {
     high: 0.00224,
     low: 0.00224,
     close: 0.00224,
-    volume: 8916,
+    volume: 4458,
   });
 
   // 24 candles, without open (unfinished) candle
diff --git a/package.json b/package.json
index ef1a79e..f64b09e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "candlestick-convert",
-  "version": "6.0.0",
+  "version": "6.0.1",
   "description": "OHLCV Candlestick converter and batcher with Typescript support",
   "main": "build/index.js",
   "scripts": {
diff --git a/src/index.ts b/src/index.ts
index 6492243..78313f7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -292,7 +292,9 @@ export const batchTicksToCandle = (
     if (timeOpen == trade.time) {
       low = Math.min(trade.price, low);
       high = Math.max(trade.price, high);
-      volume += trade.quantity;
+      if (i > 0) {
+        volume += trade.quantity;
+      }
       close = trade.price;
     } else {
       result.push({ time: timeOpen, open, high, low, close, volume });