Quote from austinp:
fwiw: I have never seen any emini trader, not one example who has ever survived over the long haul using inverted risk/reward ratio.
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I found this post interesting and I'd like to clarify a few points. There are two ways to measure the R/R ratio:
1 - Compare the stop and profit targets.
2 - Trade 100+ trades and then calculate it by dividing total win $ by total loss $.
When you say you haven't seen trader make it with an inverted R/R ratio, which are you referring to?
For awhile, even some period of time a trader can string together solid performance using that mm approach. However, it is 100% certain that market conditions will change, tapes will behave differently etc. By the time said trader adjusts to that change, the % larger losses have whacked his account hard.
Then begins the mental = emotional breakdown of discipline, which leads to ruin.
Isn't this true of any system, not just systems with inverted ratios? Let's say you have a system that is 80% win rate and 0.80 Reward/Risk (note I don't put them in the same order as the OP). And another system that is 50% with 2.0 ratio. They both have basically the same equity curve which is almost a straight line up.
Either one could stop working due to changing market conditions. It seems to be that the circumstances given above that lead to financial ruin would apply to both systems, not just the one with the lower reward/risk ratio.
Smaller win, smaller win, smaller win... larger loss. That eventually leads to smaller win - larger loss - larger loss - larger loss streak. It's 100% certain probability of happening, given enough time.
In the first system (80 0.80) if you suddenly found larger losses than normal then you could re-evaluate the system and decide if this is just normal drawdown or if maybe the system changed.
In the second system, it would fail in another way. Instead of larger losses, it would just have more losses more often. In other words instead of breaking down in the R/R ratio, it would break down in the win rate %. Instead of 50% winners it'd be 25% and that'd make the system lose money.
It seems to me the R/R ratio isn't really a factor here.
I think the evaluation of a system should be based on the expectancy & the number of trading opportunities. This is what influences the equity curve. As I've shown before the equity curve can be a straight line whether you have a 0.80 ratio or 2.0.