I can find lots of info on adjusting these if I do not use the algorithm framework. But if I am using the framework, how can I adjust these daily in AlphaModel.Update()?

I can get each stock I hold from QCAlgorithm.Portfolio and from that the SecurityHolding.Price. And from that I now know what I want for the new adjusted stop loss & limit order.

But how do I then set those? And first, get the existing values because I only want to adjust those up, never down.