Relocating or changing the area you are going to sit and wait for your next load in takes time in the business to determine and can be totally different from one carrier to the next...
The ways to make your decision to move are as numerous as their are drivers...Some people will sit for 4-5 days or even 9-10 days in an area waiting...me I use to give the carrier 36 hours to either load me or i was moving..I am now making the effort to stay in an area 48 hours minimum because my carrier now pays me to sit that long..its a hard thing for me personally to do, especially when I am in an area that in my personal experience hasn't been real good for out bound freight..but its about letting dispatch work to find those loads...
Anyhow, after you have been with a carrier a while, you will see patterns in where their freight comes from and how long you usually have to wait. If you are on dispatches good side and your carrier doesn't whine and complain when you call in, then call and ask where they see freight but don't have any of their own fleet....If you are sitting with 5 other units from the carrier you are leased to and they normally do 2 loads a day from that area and you are #6 , why stay, move...
As was pointed out, talk to other drivers with your carrier...When I deliver to an area i haven't been before and it is a small backwater area, i'll ask the guys in recieving what direction I need to head to where there is more "industry"...that can be a good area for outbound freight...sometimes it works, sometimes it doesn't
One thing to keep in mind when moving is how far to move, and that depends on how far out from your location that dispatch is looking for freight...yea in alot of situations, the closest truck to the freight is going to get the load, but that is not always how it goes...if dispatch is looking within a 100 mile radius of your location and all things are equal in determining which truck is going to get the next load....if you are 5th down, it ain't going to be you...so to get out of that situation, you need to move outside that 100 mile radius.....
Another thing is who is paying for the move if anyone....I mean, you can sit and gain "dwell time" (the amount of time you sit and wait) of lets say 36 hours and you decide to move...well with alot of carriers, they will pay you X per mile to move, BUT it ain't never worth much and chances are you will lose that dwell time...now, if you decide to move on your own and not take the paid move, in most cases you take your dwell time with you...that can work to your advantage in some cases...you maybe bring 39 hours dwell time with you to a new area, and 2 hours later someone pulls into that area..but they brought 42 dwell time hours, they just mived ahead of you on the board.....but if they only have 30 hours, your dwell time from the other area still keeps you #1 in board position....also if you move to an area that already as 2 trucks sitting, but they both have less dwell time then what you are bringing to that board, you just moved in ahead of them...
As i said, it takes time t figure out when, where and how to move...but it can be and should be done when it is to your advantage...and as OVM said, changing carriers alot, makes it that much harder to figure out.....
Now, with all of that being said, an area that was good for outbound freight 6 months agao might be worthless today....