Any suggestions for the code required to count the number of trades per day, when running the daily equity ROC exploration on a backtest?

this is the original code:

if (Name() != “~~~EQUITY”) Error(“Switch to the ~~~EQUITY ticker first”);
Filter = 1;
AddColumn(ROC(C, 1), “Daily Return %”, 1.5);
AddColumn(?????, “Number of Trades”, 1.5);