Hi Victor yes  what you share here is a standard definition that is the basis for my system.  A while back I ran a model and found friday to friday worked best for period #2.  I have used this system for 5 yrs now.  I use TNA.  Also I generally look to RSI5 to make sure we are not topping near term.  My first trade was from Period #1 was TNA 64.51 to 66.75. Period #3 is currently set to trigger on 18th.