Waddah Attar Explosion [LazyBear]

This is a port of a famous MT4 indicator, as requested by user @maximus71. This indicator uses MACD/BB to track trend direction and strength. Author suggests using this indicator on 30mins.

Explanation from the indicator developer:

"Various components of the indicator are:

Dead Zone Line: Works as a filter for weak signals. Do not trade when the red or green histogram is below it.

Histograms:
- Red histogram shows the current down trend.
- Green histogram shows the current up trend.
- Sienna line shows the explosion in price up or down.

Signal for ENTER_BUY: All the following conditions must be met.
- Green histo is raising.
- Green histo above Explosion line.
- Explosion line raising.
- Both green histo and Explosion line above DeadZone line.

Signal for EXIT_BUY: Exit when green histo crosses below Explosion line.

Signal for ENTER_SELL: All the following conditions must be met.
- Red histo is raising.
- Red histo above Explosion line.
- Explosion line raising.
- Both red histo and Explosion line above DeadZone line.

Signal for EXIT_SELL: Exit when red histo crosses below Explosion line. "

All of the parameters are configurable via options page. You may have to tune it for your instrument.

More info:
Author note: forex-tsd.com/metatrader-4/6022-waddah-attar-explosion-indicator-2.html
Video (French): youtube.com/watch?v=oLxa-XcenrI

List of my other indicators:
- GDoc: docs.google.com/document/d/15AGCufJZ8CIUvwFJ9W-IKns88gkWOKBCvByMEvm5MLo/edit?usp=sharing
- Chart: tradingview.com/v/4IneGo8h/