Hey, What do you want to test in sand box ?? You can emulate this in two ways 1)Use library and comment your buy and sell signals.All other things can be tested by doing this in market hours 2)wait for mock exchange day then you can test your complete strategy(buy sell included) without any financial risk The upcoming mock trading days are October 01, 2016 November 05, 2016 December 03, 2016 for further details you can check this link https://www.nseindia.com/global/content/market_timings_holidays/contingency_drill.htm
What do you want to test in sand box ??
You can emulate this in two ways
1)Use library and comment your buy and sell signals.All other things can be tested by doing this in market hours
2)wait for mock exchange day then you can test your complete strategy(buy sell included) without any financial risk
The upcoming mock trading days are
October 01, 2016
November 05, 2016
December 03, 2016
for further details you can check this link
https://www.nseindia.com/global/content/market_timings_holidays/contingency_drill.htm