Doing the opposite of a losing strategy

[888bet]

Let's say I'm following a particular strategy (example: bet for home team win) which gives an average loss of 10% in a bookie with margin 5%. Then will following the opposite strategy (bet on away team win and draw) give a profit of 5% over the long run?

 

[bet356]

This is nice idea if you play only on on "0 commition markets" or close to that ...
Some bookies have zero commition in big games, and you can find more , but there are not so many.

If you find a loosing technique in these markets, you will win same amount playing the oposite .... there are lots of bad players in big markets making value so if you oposite them, you will get it