Cannot import lots of rows into custom symbol

[Mark Wilson]

Hi,

I have been trying to create a custom symbol on MT5 and importing lots of historic data into that symbol for backtesting.

I can import 10 rows, 20 rows, 100 rows and 1000 rows of data, however when I try to import 10000 rows of data or more, it just fails.

How can I import lots of 1 minute data into MT5 for backtesting ?

Thanks

Mark

[Shino Unada]

I've done it before.

I think it is possible to split the data into about 2000 lines per file and import them in order, starting with the oldest data.

[Mark Wilson]

Hi Nagisa,

Thank you for your response.   I must admit that I was hoping that there might be a quicker way of doing this.

If for example, I wanted to backtest against 10 years of data, I would need to import roughly 5 Million rows, which is roughly 2.5 thousand to 5 thousand files.

The idea of importing 5 thousand files looks like it could be extremely tedious.

Many thanks

Mark

[Shino Unada]

Then I guess you'll have to create a script.

This is the one I created to import data for Japanese stocks, so it won't work as is, but I think it can be modified to work.

[Mark Wilson]

Hi Nagisa,

Thank you very much for your script.   I think this will be very useful.   I wasn't aware of the "CustomRatesUpdate" function, which looks like it could be

the solution to my problem.

Once again, thank you for your help.

Mark