if BNF fut touches 31500 or above.. then only short is OK, but still it is risky since yesterday market was oversold, now it recovered to correct level (approx 31300 to 31500) ... so in this range actually there is no opportunity.. although some might do scalping .. some will gain ..some will lose. But no major benefit in this risk /reward !!!
31500 PE is currently @ 122 .. its was 1500 last week on 22 May