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Recently, I’ve been looking at various indicators for contract trading and found that the long-short ratio is actually quite useful and worth understanding well.
Simply put, the long-short ratio is an indicator used to measure market sentiment. It reflects the collective mindset of traders—how many are bullish and how many are bearish. The calculation is straightforward: divide the number of long positions by the number of short positions. For example, if there are 80 longs and 40 shorts, the long-short ratio is 2.
Why should we pay attention to this? Because the market is fundamentally driven by participant behavior. When the long-short ratio is above 1, it indicates more long positions, and the market sentiment is optimistic. Conversely, if the ratio is below 1, with more short positions, the market atmosphere is more pessimistic. This is the core meaning of the long-short ratio—it is an intuitive reflection of market sentiment.
First, understand the difference between long and short. Going long means betting on the price going up; going short means betting on the price going down. In the contract market, you don’t need to actually hold the asset; you can express your view through futures contracts. Usually, during a bull market, there will be many long positions, and during a bear market, short positions will increase.
I previously saw an example: on March 21, 2023, for the BTCUSDT perpetual contract, the long-short ratio was 0.77, meaning there were actually more short positions. Specifically, on Binance futures, 56.46% of open interest was short, and 43.54% was long. This tells you the overall market expectation at that time—more people were bearish.
However, an important reminder: the long-short ratio is just a reference and should not be used alone as a basis for trading decisions. It should be combined with technical analysis, fundamentals, and other indicators. You can monitor changes in the long-short ratio periodically to identify potential trends, but to reduce risk, a comprehensive market analysis is still necessary.