This is a MTF killer zone, its drawn when yesterday or the last period closes, it so powerful.
The way I use it is buying and selling as a support and resistance (but it's not support and resistance), or at a retest when it break, and if it not being touched by the price today or in the current period ... than the zone will be still valid for any time in the near future (3 to 4 days or period in the future).
You can use it as a target if you already have an open position in the market, or use one time frame for entry and other for target.
I can send for you on request different time frame key zones, such as monthly and also good for yearly.
I recommend major pairs, also any other financial instrument ( Commodities, indices, bonds, and equities).
Enjoy the setup please! :)