Expected run of outs for 10% = 65
'''''''''''''''''''''''''''''''''''''''''''''''''' '''' 20% = 31

Betting level stakes , bank should be at least 3.5 times the run of outs.
E.g. 10% SR for a run of outs of 65 X 3.5 = 228
Bet $1.00 for a bank of $228

20% run of outs 31 X 3.50 = 109
Bet $1.00 for a bank of $109

Cheers.

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Cheers.