Presumptive income

Hello I am salaried person and also doing MCX Future trading. My turnover is 80,000  with loss of 1000. Now If i opt for ITR 4 SUGAM (presumtive income scheme) and show 8 % profit will it be illegal/noncompliant ? Can AO charge any pentalities if I fall under scrutiny. My sole intention is not to evade tax (in fact I am paying more) but to avoid the costly audit charges. Kindly reply