Suggestions for a very conservative progressive staking plan for my system

[real55555]

Hi all, I have generated a systems betting on asian handicaps in soccer which has about 55% strike rate. Problem is that the returns tends to be quite volatile during the time I build my sample/trial, for a $100 flat bet per match, it can return about $1000+ in one week, and lose $800 the next week, and so forth. There would be no problem if my picks only starts after the previous one finishes, but on saturday and sundays, it tends to happen that a few of my picks starts on the same time, especially 15:00 when all the english leagues kick off, this leaves me the problem of coming up with a progressive staking plan for my system. So I wanted to ask the punters here whether anyone has any good and conservative staking plan that can at least reduce the volatility in my system? What I'm looking for is just a staking plan that is very conservative i.e. recoup 10-20% of my previous match's losses. Biggest problem is the same kick off time for some of my picks. TQ