Thanks, Jim. I think a combination of caching the values and using some sort of throttling (updating threshold) will probably do the trick. I am new to trading and have a limited exposure to programming and wanted to confirm if there was a more elegant and/or obscure way the pros. would do it.

<t>How would one code this concept? I am not sure about how the returns and their arithmetic is implemented. The formula I am trying to implement is something like Z = Return (stock) - beta1*Return (market) - beta2 * Return (sector). Assuming stock is APPL, market is SPY and sector is IYT and beta v...

<t>Hello expert programmers,I am trying my hand at writing a code to implement a trading formula. But I am not sure about how the returns and their arithmetic is implemented. The formula I am trying to implement is something like Z = Return (stock) - beta1*Return (market) - beta2 * Return (sector). ...

That makes sense. Thanks a lot, Alan!

<t>Thanks, Alan. But I think there would be collinearity issue with putting those two variables as explanatory variables. I think I can overcome that issue by doing the same thing as you suggested but doing it in two steps.I am trying to implement a model that would publish the ortho. returns. So, t...

<t>Hello,I am trying to do real-time analysis for myself and I need suggestions finding the stock returns orthogonalized by returns of two other ETFs - SPY and FXC. I am trying to do generate this signal intraday for extracting that excludes (is orthogonal to) the intraday moves in these (or any oth...