Long BIRLACORPN

BIRLACORPN given successful closing above 52 week high Rs 1143 a long position can be around this price and Strict Stop loss of Rs 55 that mean exit the position if come near Rs 1087 as the move fail.
Reason behind long is the strong bas formation 944-855 and break out of 52wk high with considerable volume. Target will be around all time high and more will be update as the intiated.
How to calulate stop loss so let say my Risk is Rs 2000 ( i am ready to loose 2000 rs if it goes aganist my view ) so my quantity will be around 2000/55 = 36 shares
Happy Investing/Trading Cheers.