Combo 2/20 EMA & Bandpass Filter This is combo strategies for get a cumulative signal. 
 First strategy
 This indicator plots 2/20 exponential moving average. For the Mov 
 Avg X 2/20 Indicator, the EMA bar will be painted when the Alert criteria is met.
 Second strategy
 The related article is copyrighted material from
 Stocks & Commodities Mar 2010
 WARNING:
 - For purpose educate only
 - This script to change bars colors.
