hi
it is better to use the dutch calculation, because whatever the prices are if there calculation is less than 100 then you make a profit on those selections.
with your setting dutch amount to win, the lower the amount below 100,the less your bet amount will be.
i would start at 95 and see how many bets are placed and how much your bet amounts are.
you need to do some testing, to get a happy medium, more bets placed, less bet amounts, but with the most wins.
how are you selecting your selections.
mcbee