MT4 Backtesting - Modelling Quality Advise

Hi everyone.
I am testing my EA and, with my broker's history quotes, I get a quality of about 57% on XAUUSD H1.
Surfing the net I have discovered a program called Tickstory that seems good to achieve a 99% modelling quality.
I have two questions:

 

1. My EA trades only on new bars, so I actually should not need every tick, with 99% of accuracy could it change so much?
2. Has everyone tried Tickstory and it is worth the price? Could anyone suggest me another (maybe cheaper) software with the same features?

Thank you very much!

It depends. Is your EA using trailing stops? Can it exit trades in the middle of the bar?
If it only opens trades on new bars and exits them on new bars, then backtesting quality shoud not matter for you. If trades are closed only by static stop losses and take profits, then it should not matter, neither.
Things get tricky when your EA is using trailing stops, automatic break-even or when it can open/close trades at any time.


I am not sure if you know that, but you can try to download more history data from your broker in the following way:

1. Navigate to Tools -> Options -> Charts and set Max bars in history and Max bars in chart to a very large number.
2. Restart Metatrader.
3. Open a chart of the instrument you are going to use, disable Auto Scroll and scroll the chart into the past as far as you can. You can do it using the Home key or with your mouse. Do it as long as new bars appear.
4. Repeat this procedure for every timeframe. Scrolling your charts back will force Metatrader to download all available historical data.

Of course, this is not tick-by-tick data, so the best you can get is 90% quality.