Hello.
For active stock traders, unless they have an extension that does so, the way quantity sales work is often somewhat annoying - if you want to sell all your stock, you will sell *all* your stock, which, while serving the premise, sometimes isn't what's intended. It certainly isn't for people who trade stocks actively.
I personally usually estimate around 2-3% a month in active profits. What this results in, is that I want to keep certain dividend blocks, completely separate from trading activity.
It's possible to deal with this in a makeshift solution; buying blocks in their exact counts and only selling block-wise, the rounded amounts will usually show easily that a block is meant for dividend, not for trade, and the inverse.
Nonetheless, this is a very "ugly" solution, which is why I'd like to propose a simple "lock"-function - either by top-order amount, or per block, that simply will make a quantity-based sale (and a block-sale) ignore locked blocks. This may be added graphically as an icon, or simply as an additional text option besides of the existing "View" and "Sell" functions of a block.