What is the stop limit and the act price on TD Ameritrade?

Try to enter your order as a limit order and put the highest price you're willing to pay.

You can also set the order for the day, day+, extended hours, or good till canceled (GTC).

If you only set for the day, your order will expire if it can't meet your price... But you'll have to set another limit the next day. If the price is moving up fast, you can do a market order to get you in, but you won't know the price until it's filled."

The stop price is a price that functions above the market price of the stock. Essentially, you can pick the price range when you execute the order.

Put simply, you want to buy or sell Acme International at [insert number here], but not any higher or lower than [insert number here].

So, when you are executing a trade on TD Ameritrade, you would be better off setting it as a limit order and inserting the highest price you want to pay.