Quote:
Originally Posted by PrivateFX
yes of course having a decent system makes a difference too but I was mainly trying to make a point that without money management, it'll be hard to be successful. Let's say 2 people were given a same strategy that includes the same entries. One person with good money management will make money but if the other person allows his losses to run and cuts his profits short, he'll lose money, even with the same exact system. Both system and money management go hand in hand but money management in my opinion carries a lot more importance than any system alone. There are many systems out there that people would classify as a losing system, such as a 20-30% winning ratio strategy but with proper money management, it can indeed be profitable if done right. What one person considers a losing system can be different to another so it really depends on a lot of things. Just like they always say, one man's garbage is another man's treasure 
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Money management is about one thing, and one thing only - your position size. That, in turn, comes from your risk profile.
Letting losses run and cutting gainers short is not money management. It's system execution, or maybe more in the area of trader psychology.
A trading system should have rules for both entering and exiting trades. If it doesn't, it's not a complete system. Granted, in some approaches the entries and exits cannot be cleanly articulated, but that doesn't mean the basic rules don't exist. The trader who lets his losers run instead of getting out when the system says to get out has a breakdown in execution, not in money management.
Now if he traded too big (or too small, for that matter) then you have a breakdown in money management.
Losses that are too large in pip size - larger than would be accounted for by the system rules - are the fault of failed system execution. Losses that are too large in terms of % of account balance (assuming they aren't the result of losses too large in pip size) are the result of faulty money management.