Without saying much, I feel a number of traders could do with some self believe and a mindset change. I am not saying that you can achieve anything in life and that includes trading, without hard work, but for most to act as if, with knowledge, focus and determination you can't achieve a level of success in trading is false.
As a side matter, one of the main reasons why people fail in trading apart from mindset is using the wrong investment vehicle. My advice for anyone who cares is to get yourself financial advice from an IFA, agree what your financial goals are, and then plan to use the financial market as one of your tools to achieving your goals. In addition, you would be ill-advised relying only on day trading for achieving your financial goals, look to go longer term including using non margin accounts to hold assets.
In fact, I am sorry to say, if you are a newbie stay clear from day trading, which is what most tend to go for. Stick to medium to longer term trades, and investments. In addition, I do apologise to those who strictly use TA, however in my opinion this is completely flawed, and should be supported with fundamentals for acting on opinions. Thus learn how to combine fundamentals with simple price patterns to take a position also taking into account momentum. My only agreement with folks that follow strictly technical analysis is in the fact that trading is a number game. However not being selective enough means small looses could soon add up to big ones, and I reckon this is what stops a lot of people from succeeding when compare to the usually sited example of a large loss, which mostly affect inexperience newbie. What kills so many accounts is too much action, folks want to trade everyday and everything, which is virtually impossible and lead to ruin.
However take what I say with a pitch of salt as I have currently released a home study package which may prejudice my opinion. However, not sure why there are so many issues around, vendors, I started my journey with a home study course, and yes as I gained experience I felt the course had served its purpose and moved on to classic like “Reminiscence of a stock operator”, “Market Wizards” “Random walk on wall street” etc. But to say people can’t benefit with at least an intellectual understanding of the market to start with is foolhardy. In addition one of the myth I hear branded about, is a good trader will be better placed to be a good mentor, again not sure where this has come from, but it is debunked by other comparative field, for example the Harvard professors who taught titian like Jamie diamon of JP Morgan, would not profess to being good CEOs. What is important here is someone who can provide sound knowledge that is readily absorbed and used.
Finally no one and I mean no one can make you successful in anything in life, only you can achieve this. However what people can do is help you on your path, and only you can assess what you require at any stage of your journey. Thus to answer the original question, the rate of success of other traders, though helpful in assessing your chance in succeeding is immaterial, as your success in trading, and investing should not be excluded here, is very dependent on how willing you are to work at it.