Confidence is the result of experience, it comes with practice it comes with gut and courage. You have to take the chance in order to gain it. You can't sit on the sidelines and wait for it to happen to you. We encourage paper-trading for that reason. Practice paper money and you gain confidence yet it's not the same as when you put out real money to test it. The gut churns with each tick on the charts and because you watch it so avidly, each tick takes it's toll on your Psyche, each tick makes you question if you made the call correctly, each tick is either a negative or positive. Your stops are your stop-gap on a trade turning against you, and at
some point you have to let go and trust. Trust that your education, practice and abilities have gotten you this far and can carry you forward to a successful performance ending in a gain for you. No one can teach it, no one can give it, no one can make you do it but without taking that leap into the void, you'll never know.
When the dance/trade is finished, and you are feeling good, receiving compliments from peers, the: "wtg", "good call", "wish I could dance like you", "I really enjoy watching you dance" all acknowledge, verify and bolster the confidence earned. Nothing feels as good as knowing you are good at something and now you got it: Confidence! So, go forth and do it again!