Tax audit requirement for individuals

I am a working professional with regular income.

I am also an investor in the equities and have both short and long term capital gains (both shares and mutual funds).

I would like to understand circumstances under which it becomes mandatory for me to do the tax audit.

Would it depend upon my overall trade volume or overall profit of the FY?

On the net I read it as "Total gross receipts exceed Rs 50 lakh in the FY". What does receipts mean here?

Appreciate your response.

Thanks, Pradeep