One significant mistake is to trade bigger lots. Lot size determines how much you are going to trade, what will be the limit of your profit, and loss. Although trading with bigger lot sizes will increase the profit you will receive, it can also make you lose a huge amount of money. To make a profit from using larger lots, the trader will need to make efficient strategies, which most beginners fail in. That is why, it is better to be on the safer side and use smaller and convenient lot sizes.