Market Facilitation Index (MFI) Backtest

The Market Facilitation Index is an indicator that relates price range to
volume and measures the efficency of price movement. Use the indicator to
determine if the market is trending. If the Market Facilitation Index increased,
then the market is facilitating trade and is more efficient, implying that the
market is trending. If the Market Facilitation Index decreased, then the market
is becoming less efficient, which may indicate a trading range is developing that
may be a trend reversal.

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