The way i do it is i distinguish between a world i call *Reality* and a world i call imagination. The laws that govern these two worlds are incompatible. What may work in imagination may not work in Reality. Markets, all markets, are part of a world built on *imagination* with it's own laws. The scientific approach is probably the best way to leverage the laws of imagination. All you are doing, in the scientific approach is you are building things based on tendencies. For example, 2 + 2 = 4 is a tendency. It's fairly reliable so you go with it...until you find out it doesn't work in some circumstances, perhaps at the subatomic level. At some level, all the laws of imagination break down, especially when they come face to face with the laws of Reality. Meanwhile, the closest thing to Reality in an imaginary world are the laws that pass as inviolate.
Reality, to me, is the domain of what you may call a "Good God". Imagination also has a kind of god that is both "good" AND "evil". That's the god that both giveth AND taketh away. A Good God would not do that. A Good God would only give, give, and give some more till it was not possible to give any more. I call such a god "GOOD". All others types of gods are missing an "o", one brick short of a full load if you know what i mean.
I insist that GOOD exists, and has long since shared maximal power with any other BEING it has created. A world where power is distributed up and down a hierarchy along a continuum is a clue that you are experiencing a world of imagination. An imaginative world is where a BEING having maximal powers uses some of it to consider alternatives. That's why a world of imagination is one where there are inequalities of power.
Believing that you are loved and are worthy is probably an excellent trading strategy. Believing you are guilty is probably the worst trading strategy because it involves subconscious self-sabotage. In really bad cases, people are just using the markets to punish themselves. If they weren't losing money, they would be punishing themselves some other way...maybe even a worse way. So the markets represent a merciful way of punishing yourself.
High self-esteem is needed to succeed in the markets, or at anything else. To raise your self-esteem, i recommend to start identifying with the so-called "higher power". In Reality, there isn't a power that is either higher or lower. All power is maximal, possessed by all. So i recommend anyone to think of themselves as the highest power. If absolute power is not your experience, it's because you are using maximal power to have an experience that involves alternatives to maximal power. This is the genesis of limitations and loss.
Till then, beware the god that both giveth AND taketh away. Such a god presides over a world of BOTH of everything imaginable. It combines BOTH extremes in every which way possible. Anything goes. So should you be worried about giving back what you've gained? If you stick to the scientific method, you have the best chance of holding on to it longer. But eventually, everybody gives back what the god of imagination gave. That's actually good news because if it gives you limitation, then it's your destiny to return to a state of unlimited Being.