I want to clarify something that I said in my above post.
Hedging on multiple wager tickets is a terrible play, just like I stated above.
That said, there are times where hedges are correct plays....see the following:
1. You have a live parlay and have one game left. Now remember, you need to be good at this and you absolutely need to be good at live betting. You realize (or believe that you realize) at some point that the team you need to win will not win, or will not cover, whatever the case may be. IN that case, given the correct odds, it MAY be a decent time to buy your way out of the wager. This could be the same with any play.
I cannot tell you how many times the team I have bet on is winning, BUT I see something in their play, or something in the way the game tracking, that tells me to get out. When doing this, make sure you are getting your best possible odds.
2. The second time it is acceptable to hedge is when you have made a futures bet. This is entirely different than a parlay and can be a fantastic time to get out of the bet. Example, I took Nishikori (after he beat Raonic) at 60 to 1 to win the US Open....the day he made the Finals I bet against him and cashed at 32 to 1. Now, I didn't do this when he was a huge dog in the semis, I waited until he was a pretty solid favourite and in the Finals, to get out.
The same thing applies to wagering on a series. When San Fran was down 2-1 in this year's World Series I placed $200 on them at +225 to win the Series. In this case I couldn't have used any other tool (like an open parlay) to get these same kind of odds, because I wasn't betting on them to sweep. In this scenario I am now thinking of reversing my position with KC +240 for another $200. This means I win either $250 or $280 with no risk and it is tempting....I still believe that San Fran wins it, but at the same time, with two games left, the cash in the hand seems quite tempting.
In my opinion this is very different than in a parlay format, because you can manipulate things and predict things. In the real world of parlays, if you keep finding yourself in this scenario, but less games in those parlays.
Just my two cents.