I just saw many beginners in the community asking about liquidation, and this is indeed the most common pitfall for new traders. When the market moves, if you're not careful, your account can go to zero, or even end up owing money—that's the dreaded liquidation everyone fears.

First, let's clarify what liquidation means. Simply put, it’s when you make a wrong trading decision, and your losses eat up your margin so completely that the broker system automatically closes all your positions, giving you no chance to recover. When your account equity drops below the broker’s minimum margin requirement, automatic liquidation occurs, and this is liquidation.

Why does liquidation happen? There are mainly two reasons: one is trading against the market trend, and the other is losing so much that you can't meet the maintenance margin. But what really causes people to lose everything overnight are often these operational mistakes.

Leverage being too high is the most common cause of liquidation. Many beginners think they can control risk, but leverage is like a double-edged sword. Suppose you start with 100k yuan and use 10x leverage to trade, which means you're controlling a position worth 1 million yuan. If the market moves just 1% against you, your principal loses 10%; if it moves 10% against you, your margin is wiped out, and you may face margin calls, ultimately leading to forced liquidation. Market movements are often faster than expected, so beginners must carefully evaluate their leverage levels.

Another common mistake is the "hold-on-to-the-position mentality." Believing "it will bounce back soon," but then encountering a gap-down drop, the broker executes a market order at open, resulting in losses far exceeding expectations. Or failing to account for hidden costs, such as forgetting to add margin after day trading, leading to a gap-down the next day and liquidation. Selling options in a volatility spike is similar—margin requirements can suddenly double.

Liquidity traps also frequently cause trouble. When trading less popular assets or during night sessions, the bid-ask spread can be huge, and stop-loss orders may execute at absurd prices—trying to sell at 100 yuan but only getting 90 yuan because no one is willing to buy at that price. Plus, black swan events like the COVID-19 pandemic or the Russia-Ukraine war, with continuous limit-downs, can make it impossible for brokers to close positions, leading to margin depletion and owing money—this is the risk of being "pushed through" the position.

The liquidation risk varies greatly across different assets. Cryptocurrencies, due to their high volatility, are considered high-risk. Bitcoin once fluctuated 15% in a day, causing most investors to get liquidated, and not only losing their margin but also their coins. Forex margin trading is a game of using small amounts of money to control large positions; many like to leverage small deposits to enter the market, but beginners must first understand contract sizes and margin calculations. Margin equals contract size times lots divided by leverage. When your account’s margin ratio drops below the platform’s minimum (usually 30%), the broker will forcibly close your position.

Stock liquidation is a bit different. Trading with 100% of your own funds means that even if the stock drops to zero, you only lose your principal, and you won't owe the broker money. But if you buy on margin, a maintenance ratio below 130% will trigger a margin call, and if you don’t add funds, your position will be liquidated. If a day trade fails and you hold overnight, a gap-down to the limit-down price can make it impossible to sell, and the broker will close your position—if your margin isn’t enough, you get liquidated.

To avoid liquidation, risk management tools are your life-saving devices. Stop-loss and take-profit orders are set to automatically close positions at predetermined prices, so you don’t suffer catastrophic losses. Beginners can use simple percentage methods—setting 5% above and below the entry price is enough—no need to watch the screen anxiously all day.

There’s also the negative balance protection mechanism, which regulated exchanges are required to provide. Simply put, it ensures you can only lose what’s in your account, preventing you from owing a huge debt. If your losses reach the bottom, the broker absorbs the rest. However, some brokers will proactively reduce leverage before major market moves to avoid huge losses caused by high leverage.

A simple piece of advice for beginners: start with stocks using cash, so you won’t wake up to a margin call. Avoid leveraged products like futures and contracts until you gain more experience. Use stable strategies—dollar-cost averaging is 100 times safer than going all-in. If you really want to trade contracts, start with micro lots, keep leverage below 10x, and always set stop-loss orders—never fight the market. Investing involves both gains and losses; before trading, thoroughly understand the relevant knowledge, make good use of risk management tools to set stop-loss and take-profit points, and only then can you avoid the tragedy of liquidation and develop a long-term, stable investment plan.