Short term capital gain shares

Not required

No Audit is not required. In your case STCG occurs and filing ITR 2 doesn't require to audit

Ok what in case i do intraday trading also

Intraday Trading, the Turnover equals Absolute Profit. Absolute Profit is the sum of all positive and negative differences from all the transactions.

I will suggest you file your return with professional person, he will guide you in better ways, as now a days department is raising the query even for small matter.

If you're making profit form Intraday trading above exemption limit then you have to file ITR 3