Services

http://datamarket.com/plans-and-pricing/ 
https://www.tradingview.com/ https://www.tradingview.com/e/2Rh6HJ0Q/


Papers

 http://faculty.haas.berkeley.edu/hender/HFT-PD.pdf
http://orff.uc3m.es/bitstream/10016/12142/1/modelling_cartea_2011.pdf

Source Code

http://glimmer.rstudio.com/timelyportfolio/shiny-d3-scatterplot/

https://github.com/isotope11/d3.chart.candlestick 

http://square.github.io/crossfilter/