Closing a position is closing a position, and closing a position is selling.

Holding a position is doing business with you. You buy some rice back, and the rice is collected, which is called holding a position, and selling it is called closing a position.

Take profit means that you set a target position. If your position today is 3950, then your bullish target is 4000, and then set the take profit of 4000. When the position arrives, the system will automatically make a profit and close the position.

The meaning of stop loss is the same. Stop loss is to correct mistakes in judgment. If you go long at 3950, set a stop loss at 3900, if you go in the wrong direction, it will fall to 3900, and you will stop and leave, and you will not lose more and more.