I would like to optimize by Expert Advisor based on 1 min data (GBP/USD)from the history centre on a regular basis. My question is how do I get the latest historical 1 min data ?? I would like to do this on an ongoing basis. Can anybody help me here ?? I have tried downloading the data by pushing the download button but not all the 1 min data that i need is there. It only seems to have a limited amount and is not complete.