Recent content by skanker

I am interested in updating some code. Currently, the formula looks to index X to determine a trigger. If it triggers, the formula will buy based on the criteria of the backtest. Can I have it purchase A stock is X index is up and B stock if X index is down? In other words, I would like to...

1. When a backtest is set to buy at the open, is it the open of the trigger day or the next day's open price? What about sells at the open? 2. I need an accurate but reasonable EOD data service. What do you recommend for US equities. 3. Is there any way to add a column in the backtest...