it would be quite simple if you knew which side would win.
you bet the losing side at the book with too much funds
and the winning side at the place you needed the money.
of course, if you knew that, why even bet the losing side
anywhere? this is why the hedging/moving money strategy
is like gambling. now if one factors in the extra juice, even
considering optimum line shopping, and one can see how
this strategy is not an exciting option.
i assume that you took advantage of a big bonus to end
up in this position. as a general observation, sportsbooks
that offer large or attractive bonuses tend to have weaker
lines than books that don't offer such bonuses. what this
means using a hedging strategy of betting both sides is
likely to increase balances at the high balance (weaker)
sportsbook rather than decrease them as hoped. sorry.