When conducting your number research, you will be breaking down multiple patterns. FOR EXAMPLE, 2PS LH/EE would display PS10, PS9 and PS8, etc...
You would need to isolate each one which can have multiple 8PS patterns. This would require you to REMEMBER past patterns you just worked through which is very difficult to do even if you write them down. THUS, a solution is to create a BACK button that allows you to go back steps in your workout.
(1) You start by identifying your MAIN overdue patterns.
(2) Then when you start isolating those patterns to view their overdue sub-patterns, it can get messy with multiple patterns and trying to remember your path back to a MIDDLE point to start researching the other MAIN patterns. A BACK button will be helpful. In other words, your MAIN overdue patterns are PS9+8PS1,2 and PS8+8PS2,2. You need to isolate. Thus, when you isolate the PS8+8PS2,2, you see the display below showing you that you now have to isolate and work through, PS8+8PS2,2+2PS1,3/3,1/2,2 with 2PS LH/EE LH/OE HH/EE. You need to remember how to BACKTRACK to this page to isolate and work the other patterns which is difficult. THEREFORE, with a BACK button, you simply click it to get back to this page and you start isolating the next pattern (REFRESHING the page will start you from the beginning).
(3) The BACK/FORWARD feature will work like an Internet browser allowing you to click arrows to move Back/Forward through the filters you just activated.
RESEARCH PAGE. I would like to create a page displaying your number research from START to END. Which you can also email or print out. This will help you visualize the number patterns progression that can be compared with the next winner allowing you to tweak your number research skills.