Try first the MathTrader7 and the Evolution Renko chart builders for easy installation and use.
 
1/ All go in Experts Folder except 'adjustable % shift median builder' which goes in the Indicators Folder (has a minimum 6 (60) pip/point brick size).

2/ The 'Algo Renko' (median) and 'Price-Based Renko' (gapped) need their .dll files placed in the MT4 Libraries Folder.

3/ Place any chart builder on a clean 1 minute chart, then open allocated Offline chart number.

4/ These builders are all good, no skipped bricks or extra long wicks during high volatility. 

5/ Chart types included: Rail to rail, gapped, non-gapped, median and adjustable % median Renko.

6/ Different chart builders may handle indicators slightly differently giving different outputs.

7/ Beware pips vs points for brick size input setting, Fx/Indicies (10=100).

8/ A coding fault in MT4 Offline charts causes them to slightly rearrange on reset/restart so charts may look cleaner, this makes backtesting problematic, this does not occurr during a live run.

9/ If an arrow indicator keeps repeating try lowering the number of 'look back' bars (max bars, history bars) in the Renko inputs on the M1 chart. 