This has been discussed, sometimes heatedly, at Big Mike's forum. Check it out if you wish.
The reality is there are only two choices: win or lose, and they all have a an equal weight. There is a 50% chance either will happen.
That is not to say, that trading can't be made to be better than a coin flip. You are able to do all the ideal research, utilize the ideal indiors, know price action just like you know the back of your hand, and create a system or method that's 70% winners to 30% losers. However, any individual trade still only has a 50% probability of winning and a 50% probability of losing(again, for the sake of simplicity and simpletons like me, I'm leaving out split even trades or trades where the single loss is commission costs).
It is likely to maintain the zone. Where every trade you make contributes to profit. So while you may get a greater winning edge at the moment, the absolute probability of the outside come on the next trade remains: Win 50% Lose 50%.
So far as trends go, this doesn't have anything to do with the invention of trends; instead the manipulation of those. Which is why great traders enjoy the late Tom Willi said, trade like the trend won't ever end. However, in doing, you still haven't changed the underlying reality that the trade is either a winner or a loser.