4 ms·

We're using Xignite's API right now. It's super-simple to integrate with.

by startuprob 14y ago

mikecsh 14y ago
Why did you choose that over something like Yahoo! Finance or Google?
- afarquhar 14y ago
  yeah that caught us out - we found that even though the data is freely available from those sources, you're not allowed to include that data in a commercial app :-(
  - mikecsh 14y ago
    Oh really? That's interesting - does that apply even if it's not distributed with the commercial app? I'm sure I've used trading platforms before which use Yahoo...
    - afarquhar 14y ago
      Our understanding of the Yahoo/google T&Cs was that we couldn't aim to profit from their data (http://finance.yahoo.com/badges/tos http://finance.yahoo.com/badges/tos). We may be being overcautious but we didn't want to risk getting into trouble ;-)
- Permit 14y ago
  I've had a lot of problems with Yahoo not having complete historical data, especially on thinly traded or OTC stocks. I wouldn't recommend using their data in a production application.
greendestiny 14y ago
They look pretty awesome. I had some mobile app idea a while ago but commercial data rates are just too scary, good luck with this app!
pja 14y ago
How far back does it go?
- startuprob 14y ago
  Xignite allows us to show the full historical data of an instrument, but because we're taking a lean approach at testing how people use it, we're limiting them to a few years.
emilioolivares 14y ago
Super interesting! Could you shed some light on to how much you are spending on the data? Is it in the hundreds, thousands or ten-thousands? Is it feasible for one person to bootstrap a website with Xignite?
gns24 14y ago
That's useful to know. Is that daily data? Have you found it to be reliable? When I started testing moving-average based strategies, my blog post about it ended up being largely about data issues, from both Google and Yahoo finance: http://grahamstratton.org/straightornamental/entries/movingaverage http://grahamstratton.org/straightornamental/entries/movinga... An extreme example was an opening value off by a factor of 100 on one day.
- mikecsh 14y ago
  In my experience, even historical or realtime data from Reuters/Bloomberg/CQG can have serious errors such as that - every trading system should be sanity checking its market data!!

We're using Xignite's API right now. It's super-simple to integrate with.

mikecsh 14y ago

Why did you choose that over something like Yahoo! Finance or Google?

afarquhar 14y ago
yeah that caught us out - we found that even though the data is freely available from those sources, you're not allowed to include that data in a commercial app :-(
- mikecsh 14y ago
  Oh really? That's interesting - does that apply even if it's not distributed with the commercial app? I'm sure I've used trading platforms before which use Yahoo...
  - afarquhar 14y ago
    Our understanding of the Yahoo/google T&Cs was that we couldn't aim to profit from their data (http://finance.yahoo.com/badges/tos http://finance.yahoo.com/badges/tos). We may be being overcautious but we didn't want to risk getting into trouble ;-)
Permit 14y ago
I've had a lot of problems with Yahoo not having complete historical data, especially on thinly traded or OTC stocks. I wouldn't recommend using their data in a production application.

greendestiny 14y ago

They look pretty awesome. I had some mobile app idea a while ago but commercial data rates are just too scary, good luck with this app!

pja 14y ago

How far back does it go?

startuprob 14y ago
Xignite allows us to show the full historical data of an instrument, but because we're taking a lean approach at testing how people use it, we're limiting them to a few years.

emilioolivares 14y ago

Super interesting! Could you shed some light on to how much you are spending on the data? Is it in the hundreds, thousands or ten-thousands? Is it feasible for one person to bootstrap a website with Xignite?

gns24 14y ago

That's useful to know. Is that daily data? Have you found it to be reliable? When I started testing moving-average based strategies, my blog post about it ended up being largely about data issues, from both Google and Yahoo finance: http://grahamstratton.org/straightornamental/entries/movingaverage http://grahamstratton.org/straightornamental/entries/movinga... An extreme example was an opening value off by a factor of 100 on one day.

mikecsh 14y ago
In my experience, even historical or realtime data from Reuters/Bloomberg/CQG can have serious errors such as that - every trading system should be sanity checking its market data!!