Hi Vikas,
Just my piece of mind on this subject.
The problem is not trend detection. It is tackled by every trader in his own way. Use pivots, ema, fib, etc...
No of ways = No of traders
Having defined trend for himself, a trader has two more challenges to overcome, before he can consistently earn from the markets.
1) To have a set of rules, which put odds in his favour while he trades in direction of his version of the trend.
This is a big task in itself, which requires considerable experience in that particular scrip, since each has its own pace. But, this is only 10% of the challenge.
2) The other 90% is following that plan. This is a very subtle category. Very hard. Best of people give up here. And they should. It is unnatural.
A new trader will mostly get stuck in point 2, but see point 1 as the problem and will reinvent the rules... and the cycle will continue.