Trend Analysis Index Backtest In essence, it is simply the standard deviation of the last x bars of a 
 y-bar moving average. Thus, the TAI is a simple trend indicator when prices 
 trend with authority, the slope of the moving average increases, and when 
 prices meander in a trendless range, the slope of the moving average decreases.
 You can change long to short in the Input Settings
 WARNING:
 - For purpose educate only
 - This script to change bars colors.
TAI
Trend Analysis Index Strategy In essence, it is simply the standard deviation of the last x bars of a 
 y-bar moving average. Thus, the TAI is a simple trend indicator when prices 
 trend with authority, the slope of the moving average increases, and when 
 prices meander in a trendless range, the slope of the moving average decreases.
 WARNING:
 - This script to change bars colors.

