It is never 50/50. All events have variables which affect every and each one in different ways.
Forget for a moment about the Stock Market and start with a simple event called Coin toss. People think that this action is random and it has a 50/50 chance, but this is false. Why? Coin toss has its variables also: human factor.
If 5 indicators tells you to go long, it'll very likely bull - hence the EA mades of plenty of indicators.
If you want to see how a chart made of random ticks looks like:
(the code in attached zip draws them)
That is totally right.