The desire for constant action irrespective of underlying conditions is responsible for many losses in Wall Street.

Investors
Jesse Lauriston Livermore
The "Boy Plunger" born in 1877 Massachusetts, who entered a Boston bucket shop at 14 and cycled through fortunes and bankruptcies on price action alone. A foundational figure in technical analysis.
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Jesse Lauriston Livermore's Other Quotes
I know from experience that nobody can give me a tip or a series of tips that will make more money for me than my own judgment.
The market does not beat them. They beat themselves, because though they have brains they cannot sit tight.
There is nothing new in Wall Street. There can't be because speculation is as old as the hills.
A man must believe in himself and his judgment if he expects to make a living at this game.
It was never my thinking that made the big money for me. It always was my sitting.
Related Quotes
Know what you own, and know why you own it.
-- Peter Lynch
In this business, if you're good, you're right six times out of ten. You're never going to be right nine times out of ten.
-- Peter Lynch
You can't predict. You can prepare.
-- Howard Marks
The most important thing is being attentive to cycles.
-- Howard Marks
The markets teach you humility every single day.
-- Ken Griffin
It's not whether you're right or wrong that's important, but how much money you make when you're right and how much you lose when you're wrong.
-- George Soros