I found not only me think so:
Dennis Gartman, a successful trader and publisher of The Gartman Letter has this to say about the value of patience: "Proper patience is needed throughout the lifecycle of the trade, at entry, while holding and exit."
Fishing for a Winner
Patient investing is similar to fishing. There are many fish in the lake and it isn't necessary to catch every fish that swims by in order to be successful. In fact, it's only necessary to catch those few that bite and fill up your net (or that meet your trading criteria).
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Summary
In summary, so much of trading is psychological, making patience a great virtue for investors. Exhibiting patience when entering a trade and having patience while a trade develops are integral parts to successful trading and investing. However, allowing patience to turn into stubbornness is something you must always guard against; consistently exiting a trade according to predefined criteria is one of the best methods of improving your success as a trader.
http://www.investopedia.com/articles/pf/07/patient_investor.asp#axzz1mjkasdGm
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Read more: http://www.investopedia.com/articles/pf/07/patient_investor.asp#ixzz1mjniiVxK
Read more: http://www.investopedia.com/articles/pf/07/patient_investor.asp#ixzz1mjmuPj8Q