Sorry, but the image you uploaded is rather useless since you don't show how you configured anything. Try setting it up like this:
The expression in the compose action is convertTimeZone(utcNow(),'UTC', 'Eastern Standard Time', 'HHmm'). This includes the minutes, because you said you want to set the logic to be after 4:30 PM. The expression returns the hour value in 24-hour format, so that is 1630. The same expression is used in the condition, which just converts the output of the compose action to a number: int(outputs('Compose')).
The yes side will be what you want to do when it is between 11 AM and 4:30 PM. The no side will be for what you want to do outside those hours.
For debugging, put your expressions in a Compose action like I did. This way, you can see what is returned from a flow run. I just ran the flow, and the expression returns, which is 1:54 PM Eastern Standard Time:
You have some conflicting information in your post as to the timeframe for the logic. Just keep in mind that converting the Compose action to an int in the condition is going to truncate the leading zero. So one minute past midnight will return 1 and 9:30 a.m. will return 930. When you hit 10 a.m., it will return four-digit numbers 1015 for 10:15 a.m. and 1100 for 11:00 a.m.