Look at the NLC chart, you will see that the downside it will go to 214-210 to complete the C wave in which e-wave will reach 214-210 to complete the triangle. However there are chances of truncation and it might start moving up. The strategy is to let it move conclusively above 275 rs, post which it will reach 307 plus in matter of few days
if you are impatient then you can purchase now, but also consider the downside before taking any decision.
Disclaimer: I am not SEBI registered member and this idea is only for educational purpose, do your own analysis and then take a call.