well the deload is to be done only when you have 'over' worked your system...that is you fatigue ur cns and then you deload so you supercompensate....if you dont train 'hard enough' to fatigue your system, then there is no point deloading.
theres 2 cases why your squat may go down :
1) too little training in the period before - now you need to increase the training stimulus (more weight/more volume/more frequencey)
2) too much training in the period before - now you need a deload, so a decrease in the trianing stimulus
so in your case, if you want to use a deload, you need to train harder the weeks BEFORE that deload.
but if everyfing is working, why overcomplicate it?
Well I guess djoe just answered perfectly. You don't really need to do a deload just for the sake of deloading, so basically, don't deload until you hit that chronic load syndrome.
When do you usually deload? Each... what # of weeks? Or you deload when you think you have to?