If you army is at his doorstep and hes are at yours. Neither has enough defence to stop each other. Do you wipe his and let him wipe yours or should you turn back and def?

depends on race.

trading with terrans = lol.

also against toss, if he takes out your crucial buildings and does a well timed recall, you're screwed lol

Depends on circumstances... here a replay where to win, one needed to base trade http://drop.sc/383223

what race do u play?

terran

Trade trade. Rally new units to back of ur base with scv if possible try to do that earlier without getting spotted, either wait for ur army to get back or spread & pounce w/o main army, lift ur buildings b4 doing that

i usually leave a few tanks or mines on ram but mainly would avoid base trade..

Trade bases it is. I once traded base with a Diamond or something level player.

He lost (I'm Silver league back then) - he can't find my one single structure with a pack of marines left but I have a bunch of void rays.