When using Request First, you are limited to making an exchange from one year prior to the start of your week up until the start of your week.
With request first, when you get within 59 days of the check in date of the week which you using for a trade, the value of your week is terribly reduced. IMHO, at 60 days, you should either deposit the week or withdraw the request and plan to use the week yourself.When using Deposit First you get a much larger travel window of one year before to two years after the check in date of your deposit. When using Request First, you are limited to making an exchange from one year prior to the start of your week up until the start of your week.