Many people trade every day but still don't know about ATR, which is a very important indicator for risk management. I’ve been using it for a long time, so I want to share my understanding of this tool.

What exactly is the ATR indicator? Simply put, it measures the volatility of the price. It does not tell you whether the price will go up or down, but it indicates how strongly the price is fluctuating. If ATR is high, it means the price is changing rapidly. If low, it means the price is relatively calm.

J. Welles Wilder is the person who invented the ATR indicator, and it appears in his book *New Concepts in Technical Trading Systems*. The reason many people don’t know about it is because it’s not used directly to find entry or exit points, but it’s excellent for setting Stop Loss and Take Profit levels instead.

Regarding how it works, the ATR indicator is a tool that measures the range of price movements over a given period. When the ATR line is high, the price swings strongly; when it’s low, the market is quiet. I personally like to use it to see how much momentum the market has. In the morning when the market opens, ATR often spikes immediately due to heavy trading.

The advantages of using ATR are many. First, it helps accurately measure volatility. Knowing how much the price is fluctuating allows you to plan your trades better. Second, it assists in determining appropriate Stop Loss and Take Profit levels. For example, if ATR is 8.2 points, you might set your Take Profit at the current price plus 8.2, and your Stop Loss at the current price minus 8.2.

It’s important to understand that ATR does not indicate the direction of the trend. It only shows the strength of the movement. To determine the trend direction, you need to use other indicators like MACD or Moving Averages. Volatility and momentum are different: volatility measures the swings, while momentum measures the acceleration of price movement.

When trading intraday, I often look at what ATR is doing. If it’s very high, it could mean the market is in a rebound phase or there’s big news, which is a warning to be cautious. If it’s very low, the market is calm, and you might wait for a big move.

Calculating ATR isn’t complicated. The basic formula for TR (True Range) is the highest of: the difference between the high and low of the current period, the absolute difference between the high of the current period and the previous close, or the absolute difference between the low of the current period and the previous close. Then, you take the average of these TR values over a set number of days—most commonly 14 days. Nowadays, you don’t need to do this manually because almost all trading platforms have ATR indicators built-in.

What I want to emphasize is that ATR is not a standalone indicator. It should be combined with other indicators like MACD, RSI, or Stochastic to generate more accurate signals. As you become more familiar with the ATR indicator, your trading system will become more structured, and your risk management will improve accordingly.