How Do I Trade With Margin On E*Trade?

I'm new to Margin all together and need some help. Here are my numbers:

Total Margin Requirements $0.00 Total Margin Equity $190.68 Adjusted SMA $205.34 Maintenance Excess $190.68 Non-Margin Purchasing Power $190.68 Margin Purchasing Power $410.68

Everytime I attempt to make a trade (selling a put option), I wont let me. I'm with E*Trade.

 

How do you see the SMA on E*TRADE?

 

Hover over "Account", go to "Portfolio", click "Margin", then scroll down. You should see it there.

 

You need to apply for options trading.
Selling naked options requires a higher approval level and thousands in the account.

 

For selling a put you'd need to be able to cover the stock put to you in case it gets in the money at or near expiration.