the newstester can't be backtested unless you have some code that you did yourself. What this does is set a limit so that once a certain hour within 24 hours is reached it will take that price, then a certain amount of pips over or under the price it started to monitor at and will open a trade.
I think the best way to check this is go on the lowest or second lowest timeframe and look at them manually, I've checked it out a couple a bit but I can't read the news that well I'm still looking into books to find out which kind of news has a bigger effect etc etc.
Still working on it over here