How can I know if a downloaded set of data "could" be used, or if it would be better to just discard it?

How does Zorro behave while testing, if it comes across a large gap?

I downloaded EUR/DKK and some of the file sizes look abnormal:
EURDKK_2013.bar --> 1627 KB
EURDKK_2012.bar --> 2910 KB
EURDKK_2011.bar --> 3214 KB
EURDKK_2010.bar --> 2194 KB
EURDKK_2009.bar --> 553 KB
EURDKK_2008.bar --> 798 KB
(presumably there is nothing earlier, as I had requested back to 2002)

So it seems the years 2008 and 2009 are definitely spotty. Should I leave them as is? Delete them? or just set dummy files with size 0 KB?

Would there be any benefit to (removing files and) re-trying the download?

In my strategy, I want it to use a basket of currencies going back to 2002 for testing. If a pair does not have data available, I was hoping Zorro would just deal it and then eventually jump in with that pair once it sees that data is available. (ie, give a warning but keep trying across the test)

Set up dummy files with size 0 for 2008 and 2009.

For checking the spottyness of a price file, you can just print the price chart and look for gaps. Alternatively you could write a script that checks the prices for missing data or analyzes them in many other ways.

Pursuant to my question in the other thread, should 2008 & 2009 be "0 dummied" for all assets? (Assuming we're talking FXCM data...)

That's a great idea to plot the price LOL... I never thought of doing that!

DdlV, I am referring to FXCM data (currently downloading for several pairs back to 2002).

My assumption/plan is that I will create a 0 KB placeholder file for every pair and every year back to 2002... that is either missing or appears spotty.

DldV: No, not for all assets, only for exotic pairs and CFDs. The data from the major pairs is fine in 2008 and 2009.