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Sep 21, 2017 at 1:44 comment added spaceisdarkgreen @Shamoon I understood it to be an average (and you're right that a more correct way would be to do it for a specific strategy). The point I was making was that when you have a range of outcomes (not binary) the kelly criterion would generalize to maximizing the expected log of your wealth under this distribution. If there is a sizable negative tail to the distribution you might find this is much less than what your method gives, even if there's sizable upside tail as well. Nonetheless, even under ideal circumstances, many people find it a bit aggressive, as noob2 said in the comments.
Sep 21, 2017 at 1:31 comment added Shamoon Well - the 299 and 1181 are actually the averages of my trades over a few months. So it's not the LAST trade, but an average. Even if I calculate on a SPECIFIC spread, the Kelly percent is like 15%, which seems high. Normally, I trade with 2-5% of my account size, so it's a bit shocking to see Kelly suggest something so high.
Sep 20, 2017 at 18:15 history edited spaceisdarkgreen CC BY-SA 3.0
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Sep 20, 2017 at 16:38 history edited spaceisdarkgreen CC BY-SA 3.0
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Sep 20, 2017 at 16:31 history answered spaceisdarkgreen CC BY-SA 3.0