The success of a trader over a longer period of time lies in his ability to trade with momentum on his side. Of course, one can argue that big traders like John Paulson, George Soros, and Tudor Jones have made big money by betting against the markets, but such opportunities are rare and very few. Normally a trader has to treat the trend as his friend. You cannot be a perpetual contrarian if you need to be a successful trader. Investors, on the other hand, focus more on value and can be largely indifferent to the flow of momentum and direction of the market.