Well, definitely it is. When you're used to the market, you're aware of how it goes and it's like an easy thing to you anymore. That's what happens when we're used to things. Being reliable depends on how good you are, how experienced you are.
And with what you've experienced, everything is going to dependent to you and when you end up with good results, that only means that there's something that you get to understand as you trade.
Experience comes from practice... more we practice more we get used to the changes in the market and how to act accordingly! One thing we must learn is to keep the head cool and have strong hands! It's learning how to feel comfortable even when rocks fall around you, you are trying to get the best from dip by buying when others are selling in panic, and to selling when others think it will grow more!
In the end, becoming a reliable trader depends on many factors, I think anyone should be free to try it to see what will happen!
I agree about having cool head and being a strong hands. There's another call for having a strong hands these and that's having a diamond hands.
As for the experience of a trader of getting used to the market. The one that's likely to succeed is the one that have more failure than wins. Having more losses makes that trader learn on where he's wrong and what he must do to avoid it on his further trades. That's why when you ask successful people, they have a lot to tell about their failures that they've used as a ladder to their success.