Dislikedso why is a pro firm asking traders to exit a trade that is going your way ,Ignored
As such, in my opinion, it is usually better to take profits when you can and increase your chances of success. I have always advocated for minimizing exposure to market to further-mitigate risk. As a scalper, I get in and get out quickly. This idea of letting your trades run may work well for long-term swing traders, but for day trading, it can be disappointing. So, it is always best to take partial profits if your strategy's R:R requires staying in longer.
One way to look at it... if you let your trades run, you may be successful with that sometimes, but not always. When it works, it's great. But when it doesn't work, it can really cost you. However, if you take profits whenever you can, you will be successful 100% of the time that you are in profit.
If the market continues to move in that direction after you have closed out all of your positions, do not feel disappointed in yourself. Instead, feel happy knowing that you beat the market. Trying to milk a position for all that you can is a risky endeavor and can quickly turn into a greed trap.
I recommend doing the same with account balances, be that with a broker or a prop firm etc.... always take profits out regularly.