Do I need every single market subscription to get historical data in IB??

For example, if I want to backtest gold future, oil future, hang seng future, gold miner etf, I need to buy live data subscription of each market in IB?

 

Sure you not. The question should be - "do you have any h. data or you should to buy it somewhere"

 

I find a free way to get data no worry.

 

Than I do not see any reason to buy it.

Btw what the app do you use for backtesting?

 

I use excel with vba and I can write my own if neccessary.