May I ,I think it it because large orders are of market order type scattered over various ticks so it is better to keep them categorized in some group of tick to see where in between which tick most of these order filled.
0.05 creates too much ladders on candles and then also we try also to find out near which price level most of the order flows,it is cumbersome.so it is better to keep them in group of a tick.
0.05 creates too much ladders on candles and then also we try also to find out near which price level most of the order flows,it is cumbersome.so it is better to keep them in group of a tick.