if you want to know which lot size is best for you, you can find this note that lot size depends on your capital in your trading account. Please wait for a while if I don't rate the market well then I reduce my lot size because I'm not sure of the direction of the next price and the maximum lot size I use is 0.10 lots. This is the way I trade so I don't use too much margin to trade. My risk is no more than 15% of my margin and I make sure that I don't exceed it. With this lot I feel comfortable with any trade and can leave the trade for a long time without fear.