It's a tool that should be in every investor's toolbox. Deal Blotter is a summary of the most recent stock transactions of any given time period. It provides a list of buy and sell orders, the buyer and seller and the transaction amount.It's a useful tool in tracking individual stocks or other investments. It can be used to track stocks or other investments by following the list. Deal Blotter can also help identify market trends and pricing fluctuations. This information can be used to analyze the performance of individual stocks or the market as a whole.