Answer
It is all depend on your price range and grid number settings. But in overall, if it straight go 50% in one move without any fluctiations, you will average selling your position up to your upper range. But if the price is fluctuating between them, like up 20% down 15% up 30% down 10% etc, you will gain a lot of grid profit from the fluctiations if those price is still in your price range.
