you cannot. that’s the reason please do not run after direction – it will change the direction of your life from positive to negative. whatever you have made in life will be lost running after direction of the markets.
i agree that if you can really get the direction right 80% of the times you can double your money in 6 months or less and make a lot of money trading nifty or stocks.
but both are a huge myth – finding the direction of a stock or nifty in the short term and making a lot of money trading stock markets in the short term.
let me also give you another example 