The thing about CHAAAAARGE is that once he starts it, he can't stop it or change his destination for it. You have to consider where he would want have picked to charge to at the time of the cast. It also makes a very loud noise upon casting, and unless he's already there, you should have plenty of time to back off until he passes by or reaches his destination.
In the worst very case scenario where he uses it to tower dive and is coming for your booty, remember not to flash away until he already crashes into you. If he aimed really far away and you flash, he'll still get you. At least then, you'll still have the flash for when he's already on you, and hopefully you'll be at the second mid lane turret to help you.
As a sticky diver, he lives to kill immobile squishes exactly like you. Just like how your job is to nuke any from liners from the back, his job is to jump on you and stab you to death. So sometimes, there might not always be much to do besides nuking him, apply a cc, and hope you don't die.
Edit: Oh, and remember that he's completely unstoppable while charging, so again, don't waste your CC on him until he stops or already rams into you.