Hi Ubetido,
1) To answer your 40% SR question.
The longest run of out is approx 14 in a row
With a less than 1% chance of 20 outs in a row.

2) With a 40% SR, the majority of the wins should come from the first 10 bets at the beginning of the day.
And also.
After the last winner was struck.

3) One approach is to stop betting if 11 outs are struck & recommence where one left off after a winner is struck .
This is not to say, that one may experience another 11 outs after the last winner, so be prepared , but it does give us the feeling of some controll when the dredded run of outs is about to decend upon us.

4) One way to work the bet on 2 horses, is to split the bet for that race, 60/40
60% on the shorter price & 40% on the longer price.
The shorter priced horses tend to win more often & this can possibly balance things up a bit while waiting for those juicy payers to come along.

5) These are the prices one is actually working to when betting 2 horses a race .
$4.00 = $2.00 e.g. Bet $2 (1+1) - Ret 4
$6.00 = $3.00
$8.00 = $4.00
$10.00 =$5.00 e.g. Bet $2 (1+1) - Ret 10

One would need a $5.00 avereage div to break even, based on a 40% SR.

6) Another approach is to use the horse paying less than $4.00 as a saver bet .
One could then bet 40% on that one & 60% on the longer priced horse.
Therefore maximising any possible profits that could be there.

Cheers.

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Cheers.