Everybody has a good sequence of wins, confidence gets to peak high,positions get increased and losing streak starts.SOLUTION STICK TO SAME POSITION SIZE.
Crude kicks about all over the place (contrary to what mentors say, if they agreed their beliefs on t/a would be useless), it is a good trender but a rough trender which knocks you out of good trades regularly.Stick to euro/usd.
Try testing your discipline on demo accounts for a month.
If you want to experience auto traders , try here
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