Yes, exactly. You set the STOP price to your trigger price. For anyone day trading low timeframes, the quickest way to enter them is to use Active Trader.
In Active Trader, click the > arrow to show more options.
Set Template to TRG w/ bracket
Set your target limit and stop loss offsets. You can save these as templates but it's buggy as hell. It won't save the wrong amounts but for me it often throws errors when I try to load existing templates and I have to delete and recreate. Very often.
In the DOM (price ladder), click the green box to the left of the trigger price. If the current price is below it creates a STOP order. If the current price is above it creates a LIMIT order. For short selling, click the red box to the right instead.
When/if the stock reaches your trigger price you'll enter at market with your OCO already in place for target and stop loss. For me, this is ideal for day trades because I just set it and forget it. Once my order is placed I'm looking at other stocks for another play. If I get triggered in, my stop and target orders are already in place so any kind of service outage (TOS, internet, power) isn't a concern.
If you want a STOPLIMIT instead of STOP to trigger you in, you can right-click the STOP order on the chart and choose Cancel/replace order. Switch the order type to STOPLIMIT, optionally change the limit price, and click Confirm and Send.