MQL4 to MQL5

 I want to convert my DORSI  (Mql4) indicator to MQL5 as it is.

There should be only three buffer differently , one buffer for sell signal ,second buffer for buy signal and third buffer for flat signal ,there must be three row for this all buffer.

Mainly I want in histogram style not as in the indicator of mql4 (LINE STYLE) AND must draw arrow on main chart.