diff --git a/hts/data/252670_20220620.csv b/hts/data/252670_20220620.csv
deleted file mode 100644
index edc536f..0000000
--- a/hts/data/252670_20220620.csv
+++ /dev/null
@@ -1,382 +0,0 @@
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diff --git a/hts/data/252670_20220621.csv b/hts/data/252670_20220621.csv
deleted file mode 100644
index a616dc2..0000000
--- a/hts/data/252670_20220621.csv
+++ /dev/null
@@ -1,382 +0,0 @@
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diff --git a/hts/data/252670_20220622.csv b/hts/data/252670_20220622.csv
deleted file mode 100644
index 1790ca1..0000000
--- a/hts/data/252670_20220622.csv
+++ /dev/null
@@ -1,382 +0,0 @@
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diff --git a/hts/data/252670_20220623.csv b/hts/data/252670_20220623.csv
deleted file mode 100644
index 2cef4d1..0000000
--- a/hts/data/252670_20220623.csv
+++ /dev/null
@@ -1,382 +0,0 @@
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diff --git a/hts/data/252670_20220624.csv b/hts/data/252670_20220624.csv
deleted file mode 100644
index 7bc2cf0..0000000
--- a/hts/data/252670_20220624.csv
+++ /dev/null
@@ -1,382 +0,0 @@
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diff --git a/hts/data/252670_20220707.csv b/hts/data/252670_20220707.csv
deleted file mode 100644
index 7803415..0000000
--- a/hts/data/252670_20220707.csv
+++ /dev/null
@@ -1,382 +0,0 @@
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diff --git a/hts/data/252670_20220708.csv b/hts/data/252670_20220708.csv
deleted file mode 100644
index 5eeff13..0000000
--- a/hts/data/252670_20220708.csv
+++ /dev/null
@@ -1,382 +0,0 @@
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-20220708,1400,3230,3230,3225,3230,18612
-20220708,1401,3230,3230,3225,3230,85405
-20220708,1402,3225,3230,3220,3225,526916
-20220708,1403,3220,3230,3220,3230,340770
-20220708,1404,3230,3230,3225,3225,15201
-20220708,1405,3225,3230,3225,3230,62624
-20220708,1406,3230,3230,3225,3230,321487
-20220708,1407,3230,3230,3225,3230,196288
-20220708,1408,3230,3230,3225,3230,50142
-20220708,1409,3230,3230,3225,3230,34211
-20220708,1410,3230,3230,3225,3230,33966
-20220708,1411,3230,3230,3220,3220,719428
-20220708,1412,3220,3225,3220,3225,34212
-20220708,1413,3220,3225,3220,3225,471364
-20220708,1414,3225,3230,3220,3230,455388
-20220708,1415,3230,3235,3225,3230,625694
-20220708,1416,3235,3235,3230,3235,282998
-20220708,1417,3235,3235,3230,3230,193426
-20220708,1418,3230,3230,3225,3230,44698
-20220708,1419,3230,3235,3230,3235,131156
-20220708,1420,3235,3235,3230,3235,89296
-20220708,1421,3230,3235,3230,3235,35847
-20220708,1422,3235,3240,3230,3235,627193
-20220708,1423,3240,3245,3235,3245,404416
-20220708,1424,3245,3245,3240,3245,398198
-20220708,1425,3245,3245,3240,3245,474059
-20220708,1426,3245,3245,3235,3240,184248
-20220708,1427,3235,3240,3235,3240,30058
-20220708,1428,3240,3240,3230,3230,396334
-20220708,1429,3230,3240,3230,3240,99772
-20220708,1430,3235,3240,3235,3240,11236
-20220708,1431,3240,3245,3235,3245,406505
-20220708,1432,3245,3245,3240,3240,479842
-20220708,1433,3240,3245,3235,3240,159143
-20220708,1434,3240,3245,3240,3240,84580
-20220708,1435,3240,3245,3240,3240,149274
-20220708,1436,3235,3240,3235,3235,245161
-20220708,1437,3240,3240,3230,3230,497452
-20220708,1438,3235,3240,3230,3235,417177
-20220708,1439,3240,3240,3235,3240,56884
-20220708,1440,3240,3245,3235,3245,796862
-20220708,1441,3240,3245,3240,3240,923995
-20220708,1442,3245,3245,3240,3245,62183
-20220708,1443,3245,3250,3240,3245,245266
-20220708,1444,3250,3250,3245,3250,31871
-20220708,1445,3250,3250,3245,3250,59684
-20220708,1446,3250,3250,3245,3250,1068570
-20220708,1447,3250,3250,3245,3245,107796
-20220708,1448,3245,3250,3245,3250,58960
-20220708,1449,3250,3255,3245,3250,344568
-20220708,1450,3245,3250,3240,3240,707542
-20220708,1451,3245,3250,3245,3245,497961
-20220708,1452,3245,3250,3245,3250,242859
-20220708,1453,3255,3255,3250,3255,15852
-20220708,1454,3255,3255,3255,3255,1047704
-20220708,1455,3255,3260,3255,3255,528620
-20220708,1456,3255,3255,3250,3255,95840
-20220708,1457,3255,3255,3250,3250,92146
-20220708,1458,3250,3255,3245,3250,770763
-20220708,1459,3250,3250,3245,3250,93888
-20220708,1500,3245,3250,3245,3245,124717
-20220708,1501,3245,3250,3240,3245,656680
-20220708,1502,3245,3245,3240,3240,185748
-20220708,1503,3245,3245,3240,3245,192340
-20220708,1504,3245,3250,3240,3245,79314
-20220708,1505,3245,3250,3240,3245,125953
-20220708,1506,3245,3245,3240,3245,62464
-20220708,1507,3245,3250,3245,3250,55996
-20220708,1508,3250,3250,3245,3250,510277
-20220708,1509,3250,3250,3245,3250,207759
-20220708,1510,3250,3255,3250,3255,134086
-20220708,1511,3255,3255,3250,3250,173551
-20220708,1512,3255,3255,3250,3250,270739
-20220708,1513,3250,3250,3245,3250,13431
-20220708,1514,3250,3255,3250,3255,457625
-20220708,1515,3250,3255,3245,3250,119778
-20220708,1516,3250,3250,3245,3245,69253
-20220708,1517,3245,3250,3245,3245,691178
-20220708,1518,3245,3250,3245,3250,1028774
-20220708,1519,3250,3255,3250,3255,173305
-20220708,1520,3250,3255,3250,3250,204274
-20220708,1530,3260,3260,3260,3260,1587268
diff --git a/hts/data/sample.csv b/hts/data/sample.csv
deleted file mode 100644
index 23b4dc3..0000000
--- a/hts/data/sample.csv
+++ /dev/null
@@ -1,4 +0,0 @@
-LABEL,DATETIME,index,open,high,low,close,volume,upper,lower,avg1,avg2,avg5,avg10,avg20,avg30,avg40,avg50,avg60,fast_k,slow_k,slow_d,rsi,rsis
-NONE,,,,,,,,,,,,,,,,,,,,,,,
-BUY,,,,,,,,,,,,,,,,,,,,,,,
-SELL,,,,,,,,,,,,,,,,,,,,,,,
\ No newline at end of file
diff --git a/hts/util/DataDownloader.py b/hts/util/DataDownloader.py
index 19f8d49..f72531a 100644
--- a/hts/util/DataDownloader.py
+++ b/hts/util/DataDownloader.py
@@ -39,19 +39,20 @@ class DataDownloader (HTS):
 
         size = objStockChart.GetHeaderValue(3)
 
-        outfp.write("%s,%s,%s,%s,%s,%s,%s\n" % ("날짜", "시간", "시가", "고가", "저가", "종가", "거래량"))
-        for i in range(size - 1, -1, -1):
-            day = objStockChart.GetDataValue(0, i)
-            time = objStockChart.GetDataValue(1, i)
-            start = objStockChart.GetDataValue(2, i)
-            high = objStockChart.GetDataValue(3, i)
-            low = objStockChart.GetDataValue(4, i)
-            close = objStockChart.GetDataValue(5, i)
-            vol = objStockChart.GetDataValue(6, i)
-            outfp.write("%d,%s,%d,%d,%d,%d,%d\n" % (day, str(time).zfill(4), start, high, low, close, vol))
-        outfp.close()
+        if size > 0:
+            outfp.write("%s,%s,%s,%s,%s,%s,%s\n" % ("날짜", "시간", "시가", "고가", "저가", "종가", "거래량"))
+            for i in range(size - 1, -1, -1):
+                day = objStockChart.GetDataValue(0, i)
+                time = objStockChart.GetDataValue(1, i)
+                start = objStockChart.GetDataValue(2, i)
+                high = objStockChart.GetDataValue(3, i)
+                low = objStockChart.GetDataValue(4, i)
+                close = objStockChart.GetDataValue(5, i)
+                vol = objStockChart.GetDataValue(6, i)
+                outfp.write("%d,%s,%d,%d,%d,%d,%d\n" % (day, str(time).zfill(4), start, high, low, close, vol))
+            outfp.close()
 
-        return objStockChart.GetHeaderValue(3)
+        return size
 
 if __name__ == "__main__":