I just realized that many traders do not understand what long and short mean. Sometimes they just click buy/sell without knowing what they are doing with their account. Today I want to share this because it is really important.

Position is the trading order you open on the exchange. When you successfully place a buy or sell order, you hold a position. Each exchange has a certain position limit to prevent some large investors from manipulating the price, which protects both the market and small traders.

The interesting thing about long and short is that they actually work in two directions:

A Long (Buy) order is when you predict the price will go up. You buy at a low level, hoping to sell higher to make a profit. For example: you buy Tesla at $150 per share with 1:10 leverage, 1 lot. If the price goes up, you profit. It's that simple.

A Short (Sell) order is the opposite, where you predict the price will go down. You "borrow" the asset from the exchange, sell at the current high price, then buy back at a lower price to return to the exchange. The difference is your profit. With Apple at $134, you can place a short order for 3 lots with 1:10 leverage if you believe the price will decrease.

But here is the "danger" that all new traders need to know: Long/Short often involves leverage. It’s like a double-edged sword. You have $1,000, with 1:10 leverage, you can trade $10,000. If the price moves in your favor by 10%, you make $1,000 — double your account. But if the price moves against you by 10%, you lose all $1,000 initially invested. That’s account liquidation.

How is long short used in practice? Traders analyze technical and fundamental data to predict trends. When positive news, market sentiment is bullish, you go long. When negative news, bearish sentiment, you go short. On charts, bullish candlestick patterns, double bottom, MACD, RSI rising are signals to go long. Conversely, double top, MACD crossover down, Bollinger Bands are signals to go short.

But there are two "danger zones" that traders must understand:

First is Margin Call & Liquidation. When losses exceed the maintenance margin, the exchange issues a Margin Call warning. You must deposit more funds. If not, the system automatically closes your position (Liquidation) — your account drops to zero.

Second is Short Squeeze — the nightmare for short sellers. Long positions have a maximum loss of 100% (if the price drops to zero). But short positions have unlimited risk because the price can rise infinitely. Short Squeeze occurs when the price suddenly surges, forcing short sellers to buy back en masse to cut losses, which drives the price even higher. The GameStop 2021 incident is a classic example — hedge funds were wiped out of billions of dollars.

Besides speculation, long and short are also used for Hedging (risk management). You hold 1,000 Apple shares long-term but the market is panicking. Instead of panic selling and losing your position, you open a short position on the S&P 500 or Apple itself. The profit from the short offsets the decline in your core holdings, helping to protect your assets.

Comparing long vs short: Long profits when prices rise, you own the product, receive dividends. But lose when prices fall. Short profits when prices drop, advantageous during prolonged downtrends. But lose when prices rise, you do not own the product, and the risk of unlimited loss exists.

Frequently asked questions: Should traders use short? Yes, when the market is in a downtrend. Long can be used in all markets. Short depends on the market — Vietnam does not allow shorting the underlying but permits derivatives shorting. Is long or short easier? Both rely on trend analysis. Should you use both at the same time? Not with the same product because of trading costs. But you can use them in different markets — for example, short EUR/USD but long USD/JPY when USD is strong.

Regarding Crypto: Long/Short crypto is similar to stocks but the crypto market operates 24/7, with extremely high volatility, and leverage up to 1:100. The risk of liquidation happens faster and more violently. Where do you borrow assets for shorting? You borrow from the exchange via CFD or margin contracts, the system automatically records it, and you just need to deposit enough margin. How do overnight fees (Swap/Funding Rate) work? When holding a position overnight, you pay interest on the borrowed funds or assets. Long-term trading (weeks/months) means these fees can erode profits.

The most important thing is to understand what long and short mean before trading. Risk management is vital. Set stop-loss orders, don’t use excessively high leverage, always have an exit plan. That’s what I want to remind you — don’t always long when prices go up, or short when prices go down. Wait for clear signals, analyze carefully, then act. That’s all.