1. ATR (combined with a of the ATR)
It allows you to filter for when the market is trending vs. when the market is ranging by using any of the three indicators. You can also combine them to find extremely good trends to trade, or if you're a channel trader, identify when you wouldn't want to trade. This indicator also includes a time frame setting to allow you to ZOOM OUT and explore the long term trend of the security you are trading. I highly recommend using this indicator as a filter for when you enter a trade or not depending on the system you like to trade.
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.