Using trend lines as Bigger picture helpsBy relying on indicators like double bottom as seen on this chart - it can be illusive and detrimental as well. We see that it tricked the buyers 3x before it finally bottomed and breaks out of the bearish trend line.
If one gets too impatient and bought at the first double bottom and hold till now, he would still be in a LOSS position.
By using the trend line and not buying prematurely, it helps to instil discipline and not let emotions rules the game.