The numerical performance of the trade is simply the stock price's change (in percentage) from when the trade was made to today. A trade is classified as good if either: they purchased the stock, then the price went up, or they sold the stock then price went down. The opposite is true when classifying a trade as bad.
An average return percentage
Don't worry about it
A trade is flagged for insider trading when the member trades a stock that's in the same sector as the committees they are members of.