Why there is gaps between historical data?

[moosa]

I am trying to optimize my EA and I am getting some error (I am not sure you can call it error), I have a small take profit but sometime i get really huge profit.

After looking at the detail i found out that sometimes there is gap in historical data and also sometimes the price jumps suddenly, I dont understand this behavior, can any one explain it to me why this is happening.

Thank you

 for example for GBPUSD:

<DATE>

<BALANCE>

<EQUITY>

<MARGIN LEVEL>

 

2003.04.21 04:17	4605.54	4933.54	3093
2003.04.21 15:46	4605.54	4611.54	0
2003.04.21 15:47	4605.54	4605.54	0
2003.04.29 16:13	10878.16	4002.5	0
2003.05.01 16:15	10878.16	10785.16	2921

 

2003.10.17 21:55	19327.7	19292.7	11355
2003.10.17 22:28	19327.7	19327.7	0
2003.10.23 15:58	20364.78	19077.8	0
2003.10.24 00:33	20364.78	21877.3	11547

[Lin Xie]

Where did you get the historical data? Are they from Tools->History Center? If the answer is yes, then the data come from MetaQuotes Software Corp, and there ARE lots of gaps (large or small) in the data. I don't know if they make it that way on purpose or whatever.

I am searching for free (or at a low cost) fx historical data for backtesting. I would appreciate it very much if someone could suggest some? Thanks.

Linx 

[Robert Czibor]

Hello,

maybe this applicable: http://eareview.net/tick-data

 

Regards