There are three that you can work to backtest to see which
 one works

an example
 

you can swap four corners and outside middle if desired.
there are no
set rules except the drawn numbers which stay as drawn.

last current draw and the last day and drawing draw of the day and draw you are working
[1[7]0]drawn wed mid 11/20 1032 four corners
[4[x]8]center 0-1or2 or your choice of digit in center
[2[2]3]drawn wed eve 11/13 7824 outside middle

the last two current draws( for mon mid you can go sat
eve + sun eve if no Sun Mid)
[1[4]0] drawn wed mid 11/20 1032 four corners
[5[x]1] center 0-1or2 or your choice of digit in center
[2[1]3] drawn tue eve 11/19 4115 outside middle

the last two current mid or eve draws
[4[2]1] drawn tues eve 11/19 4115 four corners
[3[?]0] center 0-1or2 or your choice of digit in center
[5[6]1] drawn mon eve 11/18 2063 outside middle

I chose the method of the 0-1or2 in center as that is
generally the most frequently draw number in the four game.
That is also optional on your part. no rules.
working this method you may have a setup of the numbers
where you may catch the no match, doubles, double-doubles,
triples and possibly the quads. Its all in the next draw
as we all know. the unknown.