I designed it to assist in top down analysis by knowing the monthly and weekly opens and closes it makes it a lot easier to make trading decisions on the lower timeframes.
As the user you can choose which price values you'd like displayed on the chart by selecting them in the user inputs.
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.