OPEN-SOURCE SCRIPT
DARVAS with five EMA
The script you're referring to is likely designed to implement the Darvas Box trading strategy in combination with five Exponential Moving Averages (EMAs): 10, 20, 50, 100, and 200 periods.
Open-source script
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 publication is governed by House rules. You can favorite it to use it on a chart.
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