Try to repeat this experience on your own. But it's better to do it virtually. File TraderSimulator.xlsx attached to the post (in order for Excel to recalculate the data, you can click the "save" or refresh button if you are in a browser).
The collapse of the situation is that our "genius" trader is likely to quit his job in six months and start living on a bigger scale. After all, he started making money with his own mind, and in general this is just the beginning... millions are waiting for him ahead. I don't think it's necessary to explain how much effort it will take to start living the old way again when luck leaves such a system. Many people can't even stop at the bottom.…
Any action in the life of a thinking person must have a logical justification. The same applies to playing in the financial markets. Your advantage must be justified by something!
Tug of war
In order to avoid falling into the luck trap described earlier, you need to gain a statistical advantage in one way or another. One of the ways to gain such an advantage is to create a trading system.
A trading system is a set of rules and conditions for opening a position, controlling it, and then closing it. If the set of rules and conditions do not contain ambivalent interpretations, then such a Trading System can be automated. System trading allows you to eliminate the negative impact of emotions inherent in money games.
Of course, no trading system will remove the influence of luck on the result, the fluctuations will be huge, but if the advantage is really gained and money management does not deplete the deposit, the new peaks of the balance chart will not be able to hide for a long time.
You can and should earn money on the stock exchange, but it requires not only intelligence, but also hard work. The creation and improvement of a trading system is the point of application of the efforts of traders who think about tomorrow.
Don't play games with negative mathematical expectation!