I'll assume you mean trend following...for real-time, not hindsight. (because it's easy to pull up historical charts and draw lines)
I like to think I'm kind of good at following/predicting/monitoring the trend for the Dow/spy/spx chart on a daily basis time frame.
You have to establish logical and rational initial loose, general, directional or semi-directional biases...and wait for the subtle, breakout signs or reversal signs to peek out and expose themselves. It's kind of a constant hybrid, dynamic dance to trade it successfully.
Scalping is for jackal amateurs -- I aim to seize the main, macro moves.
You can't trade or wait for or expect something...if you don't know what to look for, or reasonably hunt and position for.
It's all about understanding the hunting ground...and the relationship between the prey and predator -- and all its collective dynamic variables between them.
Part art, part science...if you have a linear, square brain looking for an automated solution Holy Grail you will fail.
Make Trading Great Again,
Get rich in 2018...High-Fives` all-around,