Hello,
could you advise me, please, which brokers offer their own historical data (similarly as Alpari does)?
I have noticed that many systems fail if they are optimized with ForexTester data and backtests are compared with those done on Alpari historical data (high profit for ForexTester data and high loss for Alpari data). So it looks like the only way is to find system and its parameters for given broker and use it with given broker. What else could I do?
Best regards!