But how can you know when price is historically overbought or oversold relative to a moving average? Distance from MA can help.
This indicator calculates the distance from a moving average as a percentage and plots the result as an oscillator. Values above 0 appear in green, while negative readings are colored red.
This chart highlights the depth of the S&P 500's recent selloff. As you can see, the close dipped to 25 percent below its 50-day on Monday. That was its most oversold condition since November 20, 2008 -- in the middle of the subprime financial crisis.
Distance from MA can handle five types of moving average. Simply change the "AvgType" input according to this key:
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.