Data Quality

[Stephen Njuki]

I have a quick question and hope someone can help me out.

If I test from 01/01/95 to 01/01/04 and in my results the data quality is 60% does this mean that only 60% of my testing period has price data for all time frames i.e. PERIOD_M1 to PERIOD_MN1 while the 40% has only price data from PERIOD_D1 and above?

[Rogerio Figurelli]

Are you using tick by tick option?

[Stephen Njuki]

I am using open prices only

[Rogerio Figurelli]

ssn:
I am using open prices only

So, double check the data quality after a tick by tick test (take care, this will be slow for your long period, so consider the possibility of a small period test), and probably it will reach the 100% value, since you will really use all market data.

[Stephen Njuki]

My question is what does quality percent mean?

[Alain Verleyen]

ssn:
My question is what does quality percent mean?

See the documentation.

[Rogerio Figurelli]

ssn:
My question is what does quality percent mean?

"History Quality — this value characterizes the quality of price data used for testing. It is determined as a percentage ratio of correct and incorrect minute data. Incorrect minute bars are the ones having zero spread, or volume 1 when OHLC values are different. History gaps are also considered as incorrect data. Depending on size, the period of testing is divided into 1 — 199 intervals. Then the history quality is determined for each of them separately. The time intervals are shown on the graphical indicator of the history quality (the lighter tint of green means the better quality, the red color represents intervals with the quality lower than 50%)."

[Stephen Njuki]

Thanks for the replies so if am not using M1 price data I should not read much into the history quality

[Simon Gniadkowski]

ssn:
Thanks for the replies so if am not using M1 price data I should not read much into the history quality

You are using M1 data even if you don't want to . . .  all other timeframes in MT5 are generated from the M1 data.

[Stephen Njuki]

Price data prior to '99 has no M1 data. I think it is only daily OHLC prices.

[Alain Verleyen]

ssn:
Price data prior to '99 has no M1 data. I think it is only daily OHLC prices.

This is why you obtain a poor 'History quality'