When buying this version of the indicator, the MT4 version for one real and one demo account is a gift (to receive it, write me a personal message)!

If the price is higher than any of the two histograms and two lines (red and blue), this is a buying zone.

MT4 version: 

If the price is located between two lines or in the zone of any of the histograms, it means that there is no definite trend in the market. Simply put, the market is flat.

The operation of the indicator is more clearly shown in the screenshots.