Scrolling from bottom to top

Hello,

We’re trying to develop an order book for trading, and we are using two tables. One for buy orders and another for sell orders.

Here is a screenshot of an example:

https://puu.sh/AUM2i/4976cd00aa.png

The buy table scrolls down as normal, as it starts from lowest price down to the highest price.

The sell table should scroll from bottom (low price) to the top (high price).

Can anyone suggest a method of making the scroll being opposite, instead of scrolling down, for it to start at the bottom and allow scrolling up?

Thanks