How do I run my EA on an offline 10 minute chart on MT4?

I have an EA which I can successfully run on various timeframes on the DAX on MT4.

However - the 10 minute chart is not one of the standard MT4 charts. I have successfully downloaded an offline 10 minute MT4 chart. I can see this holds data for over the last year - which is sufficient for my initial test.

I have my EA on the chart -everything is setup. SO all good.

The only thing is - when i set up the variables to run the strategy backtest on MT4, on the timeframe dropdown menu I do not see the 10 minute option there. I still only see the default MT4 intervals (1m, 5m, 15min etc)

Does anyone know what final step i need to do to test my strategy on the 10 minute chart? It has to be possible as i can see my 10 minute chart with the historic data on it.

Could be wrong but don’t think it is possible on MT4 … even if you can mange a back test … don’t see how you’d be able to run it live. If you made the bot yourself you could code it too look at 2x 5m bars instead of one but depending on how complex your strategy is could be really wonky.