We have hijacked the main subject as the OP meant trailing on deal value. The question of trailing up for grid bots was discussed here for example Trailing UP feature for Combo and Grid bots
I described the trailing up in the article you mentioned by removing one buy order from the bottom and placing it at the top, when the price already crossed it on the way up (so it can be placed below as a new buy order). Because that extra base was not bought before reaching the top, now you have to wait until the price is higher to keep placing buy orders under. On the other hand, the combo bot would have been profiting because it already bought the necessary base and the sell orders were placed beforehand.
So as I see this, that way of trailing up is not any better than the combo, and I can’t think of any scenario where it would provide significant advantage.