I just update Ninja to 8.0.13.1 and I had many (circa 20) crashes of the application doing market replay when I did actions on a chart with HeikenAshiCustom indicator on it. It is not a new indicator for me so I suspect that the issue is in something different in Ninja so I suggest you to check HeikenAshiCustom and Market Replay together
As soon as I removed this indicator I was able to work on Ninja without any issue so it is 100% sure that here is the problem, before removing it Ninja crashed any 5 minutes as you could see in the attached list of Windows Error Reporting events
2018-04-01 09:26:44:213|3|4|Indicator '': Error on calling 'OnRender' method on bar 299: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
Here below you could find also one ninja log of the many, they are all similar
I hope it helps
Windows Error Reporting.txt
HeikenAshiCustom.cs
log.20180401.00001.en.txt
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