How do I calculate the Average True Range on stocks to set a stop loss position? Any successful trader will tell you that stop losses are essential to a good trading strategy, but knowing where to place your stop loss is less obvious.
Average True Range ATR can be an effective way to set stop loss positions and profit targets, and avoids the problem of being stopped out early. What is the Average True Range? Essentially, the ATR is a measure of the volatility of a stock, and can be calculated and used on any trading instrument over any time frame.
It was first developed by Welles Wilder and published in It was originally applied to commodities and was developed to capture the effect of the opening gap on price movement and volatility. The True Range is defined as the largest of three measures: We use the absolute value, which means the number will always be positive. It is important to remember that while I have used the calculation here for a daily True Range, the same principle can be applied to any time frame.
In this chart, you can see the True Range for a series of days shown by the black boxes. If the candle is large it is more likely that the True Range will be calculated as High less Low. Small candles coupled with opening gaps will result in one of the other calculations being used for the True Range. In effect the ATR measures the average daily range including any opening and closing gaps.
The time period you use is not that important, with shorter time frames making the indicator change more and longer time frames smoothing the indicator out. Typically averages of 3 — 14 days would be used. Fortunately most charting software packages will do the maths for you, and plot the ATR above or below the chart, shown below in blue.
Since the ATR shows you the normal daily movement of the share, you now have a set of parameters to guide you to where to place your stop loss. This is why stop placement should be 1- 3 times the ATR away from the price.
When trading long buying shares , stops are usually calculated from the low price, though some traders choose to calculate stops from the closing price or from the high price, which is referred to as a chandelier exit. If in doubt choose the low price for your calculations. To calculate the position of a stop, subtract 2 times the ATR from the low.
So in this case: To trail the stop loss simply redo the calculation tomorrow and adjust your stop to the new level. Try a few different multiples between 1 and 5 decimal points can also be used e. Remember, the larger the multiple the longer you will hold your positions. Using the ATR to calculate stops can work well on a share, regardless of the price or volatility. An alternative approach is using a percentage stop, which is always the same distance from the share price: The ATR-based stop automatically adjusts for the share you are trading regardless of its price and as the volatility changes the level of the stop also changes.
This flexibility gives the ATR stop a definite advantage over a fixed- or percentage-based stop. But whichever approach you go with, just remember to always use stops in your exit strategy. Other articles in this week's newsletter. Stocks fuelled by China's growing economy.
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