It is an that could be configured to only show up, if the last 1..n candles are NOT crossing the in any direction.
I figured out that lower timeframes ( < 30 min) often the price bounces around the 200 and gives lot of false signals using different strategies.
So i decided to write a small indicator to avoid taking trades in those market conditions.
The Indicator could be configured for the length of the and how many crosses must be happened in the defined numbers of candles.
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.