fidelity retirement accounts are not good for TD, because settlement of overnight trading is T+1, but DT is T+0;
The GUI display is also strange for limited margin accounts.
Since my Roth does not have much money in there, I have not used many of the features. Here is what is available: (Call fidelity to verify the availability before you open an account)
Account Agreements
Margin Agreementhelp Sign Up
Portfolio Margin Agreementhelp Learn More
Canadian Withholding Taxhelp Exempt (Registration) help
Options Agreementhelp Sign Up
Designated Investments Agreement (DIA)help No Agreement on File
International Tradinghelp Learn More
Extended Hours Trading Enabledhelp Agreement on File
Penny Stock Trading Enabledhelp Call Fidelity to sign up help
Short Sale Terms of Usehelp View and Accept
Retirement Account Spreads Tradinghelp Sign Up
Limited Marginhelp Learn More