Solved the error this way....Correct way?
def MACD_color(data): MACD_color = []
#for i in range(0, len(data)):
for i in range(0, len(data)):
if i==0:
MACD_color.append(False)
if i>0:
if data['MACDh_12_26_9'][i] > data['MACDh_12_26_9'][i - 1]:
MACD_color.append(True)
else:
MACD_color.append(False)
return MACD_color