Just a simple script to subtract any two symbols giving a delta of the values, and then getting a cumulative sum of each bars delta value. The two default symbols are the Value of All Trades on Upticks for US Stocks, and the Value of all Trades on Downticks for US Stocks. There are a lot of possibilities with this. Delta is turned off by default, to turn it on you have to select "Show Delta" in the inputs.
