Recently, I saw someone in the community asking what closing a position actually means, so I thought I might as well organize this topic, because really, many beginners don't understand it clearly.

In simple terms, closing a position means ending the trade you have already opened. But there's a common misconception here: closing a position doesn't necessarily mean selling. If you're going long and buying, then closing is selling. But if you're shorting and selling, then closing means buying back. This is a confusion many people have when they first start.

Closing a position roughly falls into three situations. The first is active closing, which means you decide when to exit, either by manually clicking or by setting a stop-loss order that triggers automatically. For example, suppose you go long BTC with $80k, and it rises to $100k; when you think it's enough, you manually sell for profit. Or, with the same $80k long position, you set a stop-loss at $72,000; if the price drops to that level, the system automatically closes your position. Both of these are considered active closing.

The second is passive closing, which is forced liquidation. In futures trading, when your losses exceed the maintenance margin, the exchange system intervenes and directly closes your position. This is what people often call a liquidation. For example, suppose BTC is at $100k, and you use $500 margin to open a 5x leveraged long contract. If the price drops 10%, your loss is magnified to 50%, with a floating loss of $250, but you’re not liquidated yet. But if it drops 20%, theoretically, your loss becomes 100%, and you lose everything. To prevent a margin call, the system usually forces liquidation when losses reach 80%, so you would directly accept a loss of $400.

The third is automatic expiration closing. Derivative products like futures and options have expiration dates; when they expire, positions are automatically closed and profits or losses are settled. You can extend your position by opening a new contract with a later expiry before the current one expires; this operation is called rollover.

During the closing process, there are also some risks to watch out for. Slippage risk is the most common—when the market is highly volatile or illiquid, the actual transaction price may be worse than expected. There's also the risk of being unable to close a position, which could happen if the market liquidity is too poor to fill your order, or during a market crash with circuit breakers, exchange outages, or even account freezes—all of which can trap you and prevent you from exiting.

So, when should you close a position? No one can predict the market, so it depends entirely on your trading strategy. Common closing triggers include reaching your target price—then you should decisively close without hesitation. If the market trend turns against you, strictly execute your set stop-loss to prevent larger losses. Also, if the market environment suddenly changes, such as major negative news, it’s wiser to close your position early.

Honestly, the hardest part of trading isn’t entering the market, but knowing when to close. Profitable traders are those who truly understand the mechanics of closing and risk management. So, if you want to stand firm in the market, learning about various closing situations and timing is really key.