Basically, it goes like this ( back at bookie, lay at exchange ( in-play ) immediately ) Now, because the sport is tennis, and it is inplay, odds can move against me very fast so I have to place bets between games and in a matter of 2-3 seconds.
So how to place bets in the fastest way possible with the right stake amounts? The stake calculation takes too much time, double checking odds, stakes and confirming bets takes at least 3 seconds more than it should.

Thanks in advance to anyone who could be of help!