Are there any day trading restrictions?

Yes, Pattern Day Trader (PDT) restrictions apply to stock and options trading.

A Pattern Day Trader is a FINRA designation for a margin account that executes four or more day trades in five business days, provided the number of day trades are more than 6% of an accounts total trading activity for that same five-day period.

These accounts need to maintain a daily equity balance of $25,000 or more and receive 4:1 Day Trading Buying Power from the clearing house.

When the Starting Day Equity Balance is below $25,000, the Day Trading Buying Power is reduces to zero (0).

The Pattern Day Trader Rule:

Margin accounts receive 2:1 margin and must adhere to the PDT restrictions when the Starting Day Equity Balance is below $25,000.

Cash Accounts are not intended to be day trading accounts.

A cash account must have settled funds before a purchase can be made and before a security can be sold.

If a cash account trades daily and liquidates long term positions, it is possible for the account to receive a "Good Faith Violation".

Cash accounts are not allowed to short stock.