Ask HN: What is a good tick data source?

Did you try http://tradingphysics.com/ ?

I haven't, thanks for the info, I'll check 'em out later today.

Tick data for free is rare...you can get it from the exchanges but you may have to pay...if your side project could be of interest to a fund you may be able to convince them to give it to you in return for information re your results

yarou 13y ago ↗

Interesting idea, I initially had that angle with Nanex, but I haven't been able to contact them yet.

niggler 13y ago ↗

I'd be wary of Nanex and their data quality in general: https://news.ycombinator.com/item?id=5146571

Most people offering market data risk running afoul of the contractual agreements signed with the various exchanges.