Why the success rate is very poor in intraday trading?

The market movement is more like Random Walk. It is quite difficult to predict direction in higher time frames which are generally used in intraday charts.

On top of that your position sizing, risk management, execution strategy should be sound for you to succeed in intraday.

The strategy you use in intraday should also have positive expectancy, if you want to succeed over a longer duration.

Intraday Traders dont follow below rules so winning ratio is toooo low

• Always Use a Trading Plan.
• Treat Trading Like a Business.
• Use Technology.
• Protect Your Trading Capital.
• Study the Markets.
• Risk Only What You Can Afford.
• Develop a Trading Methodology.
• Always Use a Stop Loss.

one word answer

"Psychology"

regards

mvp

Not creating a system to trade leads to losses. 

Losses eventually kicks out the trader. 

The simple answer is a lack of education on TA, Money Management, and Psychology (emotion control). if u r an expert in only one and average in the other two u will get decent profits.....if u r an expert in all 3 u will get unlimited .........thank you .......so increase the education levels...

It is greed. Lack of education, Psychology, finally over-enthusiasm takes the toll of trading balance

It's because they refuse to walk away when they lose some money. They want to recover the losses on that same day and that is usually the beginning of the end. If they can learn how to take a loss and move on, it's hard not to be profitable. You don't need to be a genius to become a profitable trader. All you need is the ability to manage volatile emotions and manage risk effectively. If you're having a bad run, call it a day and come back the next day with a fresh mind. If one can do that, then half the battle is won.