If you wanted to open a swing trade off the 4 hr, is there typically a best time of day to enter, in terms of session opens and closes? Or does it not matter so much?
A swing trade is when before being place, you know you will hold it at least 24 hours and up to 5 days. So is a intraweek trade. The time of the day is not as important as the day of the week since you would want to avoid weekends.
As stated by Yunny1, a swing trade on the 4H will have you hold the trade for several hours if not days, thus making the time of day a less important factor. Now, if you want to know the most active part of the day (usually with most momentum) I would suggest from Frankfurt open (1 hour before London Open) to mid US session. This part of the day is [U]usually[/U] the most busy and thus provide you with more momentum than for example the Asian session that tends to be a more quiet session. Frankfurt opens at 07.00 am GMT. Check this link below for a complete list of market hours.