can be done...if a business that has easy entry...then a lot people are doing it...if a business that has hard entry...then it is an edge if u succeeded it as u can dominate the business.
Normally those u succeeded will keep their secret cos it is their hard earned 'formula' eg bulkbiz. thats explain 10% richman in the world, maybe 80% normal ppl striving 9 to 5 job(rat race), 10% stuck in poorman world(rough stats only)..i dont dare simply say anything here as i saw  'war of words' between poks with some other guy here.
maybe u can see some other trader trading statement (updated every 5 minutes) to witness it.
http://financialmy.mt4live.com
Quinn also good in his ichimoku skill as well as poks in manual trading skill, and many others. Thomas, my idol, missing in action..probably become billionaire with his sharp and accurate entry..hehe..

Do u have a trading plan? Are you recording your trades entry and losses base on your trading plan? If u do so, don't see how u can give up unless your system really is screwed. If u have been changing system, either the system is bad or your own problem. Think about it.