Hi Tung, thats great that you have started. So you can get the most out of this i am going to help guide you through this using hte software. I am assuming that you have started the free trial already for EA Studio?
Here is what I want you to do as a first step:
Set the data period to the most recent 5 years and then import the EA into EA Studio to see its performance. For the GBPUSD EA apply the MACD parameters for each shown above on the M30 and H1 and see what shows the best backtest. Then repeat to check what ones work best on the H1.
This can then be repeated for the other EAs and pairs that you mention.
Doing this exercise will help you get up to speed with EA Studio much faster.
Let me know if you have any further questions and I will help you,
Cheers,
Sam