The key is to find a 2H line of 7 or more and figure out which team, if covering, would cause the middle to miss.
A middle is the difference between a team's pre-game betting line and that team's effective in-game betting line taking into account the halftime score and the second half line.
While doing some number crunching on Porky's system, I discovered this trend back in week 7 and decided to back-test this to the beginning of the season.
This year 16 games presented a 2H line greater than or equal to 7 points. There appear to be about 1-2 games per week that fall into this situation. Here are the YTD results.
WK 1 - CHI +10 @ IND () - middle 8.5
WK 3 - CIN +7 @ NYG () - middle 9
WK 3 - MIA +7.5 @ NE () - middle 19
WK 4 - KC +7 vs DEN ( - middle 5
WK 4 - OAK +7 vs. SD () - middle 16.5 (4th Qtr meltdown)
WK 4 - WAS +8 @ DAL () - middle 9
WK 5 - CIN +7.5 @ DAL () - middle 2.5
WK 6 - DET +7 @ MIN () - middle 7
WK 6 - STL +7 @ WAS () - middle 8
WK 6 - CLE +7 vs. NYG () - middle 4.5
WK 7 - STL +7 @ DAL () - middle 17.5
WK 8 - KC +7 @ NYJ () - middle 7
WK 8 - CLE +7 @ JAX () - middle 10
WK 9 - CIN +7 vs. JAX () - middle 11.5 (another 4th Qtr meltdown)
WK 9 - KC +7 vs. TB () - middle 13.5 (lost with 0:25 left)
WK 10 - KC +10 @ SD () - middle 10 (a miracle end)
CURRENT RECORD IS 13-3 (81%) YTD.
Road teams are a perfect 11-0 (100%)!!
Porky's system uses a 10-pt middle. If we put that stipulation on our teams, we would only be 4-3 YTD. All plays appear to be on the 2H dogs, however, this is not a dog system!!
Also note, the same teams appear to qualify every week (CLE, CIN, KC, etc.) - the BAD teams which just happen to play well enough in the 1st half to grab a +7 or higher 2H line.
So with the tightener (of +/- 7 on the 2H line) and a loosener (selecting all teams regardless of the middle), I was able to find this and make it into a system.
I will continue to post plays as they fall into this system. Let's take some of that bookie's bacon!!