Sona BLW is in uptrend since IPO. 501 is 0.618 fib retracement level. If it holds 501 then
T1 : 683 T2 : 837
Trend is negated if it closes below 501 , then it may go to 411.
For traders SL is below 500 , for investors keep SL as 411. Add few at 500 , rest near 411 if get a chance (Personally I do not feel it will go near 411)