- When 'Progressive Lot Size' then the Value is percent of free margin to calculate the lot size. Default 5%. This 5% is a nice average. Depending on your account size or the drawdown you are willing to accept, you can change this value. So you can go higher or lower with that setting.
The EA can be used on other instruments, but that has not been tested, it was optimized on EURUSD. What you can do is run it in the strategy tester and if you find a good pair, you can use the EA on it. But use real tick data to test! (Like Tick Data Suite)