Chande Forecast Oscillator Backtest

The Chande Forecast Oscillator developed by Tushar Chande The Forecast
Oscillator plots the percentage difference between the closing price and
the n-period linear regression forecasted price. The oscillator is above
zero when the forecast price is greater than the closing price and less
than zero if it is below.

You can change long to short in the Input Settings
WARNING:
- For purpose educate only
- This script to change bars colors.