Bearish Engulfing Backtest

This is a bearish candlestick reversal pattern formed by two candlesticks.
Following an uptrend, the first candlestick is a up candlestick which is
followed by a down candlestick which has a long real body that engulfs or
contains the real body of the prior bar. The Engulfing pattern is the reverse
of the Harami pattern.

WARNING:
- For purpose educate only
- This script to change bars colors.