Closing a position in MetaTrader without the trader's knowledge
Over the ten years I've been working with the MetaTrader trading platform, I've encountered situations more than once where previously open orders were closed without my knowledge.

You've probably had situations where you leave a trade open overnight, only to discover in the morning that the order has been forcibly closed.
It turns out that there are quite a few scenarios that could result in your MetaTrader position being closed without your intervention.
Moreover, forced closure does not always imply a negative financial result; situations do vary.
So, why might your position in the trading platform close on its own?
Advisors and scripts can also cause surprises. For example, you might test a robot, then forget about it, only for it to continue trading and eventually close your trade.
Unforeseen situations – these most often occur in stock trading, when the issuer performs certain transactions with its securities. For example, Tesla conducted a stock split, causing many stock brokers to forcibly close out their clients' short trades.

Stop orders are probably the most common option, whereby a trade is closed when the stop loss, take profit, or trailing stop that you set yourself is triggered.
Broker risk insurance —or forced closure by the broker via a stop-out —is one of the most unpleasant options. In this case, the brokerage company automatically closes your order if the loss on the transaction exceeds 50-90% of your deposit, with the percentage varying depending on the account terms.
Stock trading is a rather risky endeavor, and it involves not only exchange rate risks, but also a host of other situations that could result in you losing your money.
Therefore, try to use funds wisely and diversify risks by distributing your available capital between several assets.

