Don, I’m not familiar with the AIM formula or variants. Could you give a brief description? It’s my guess Darvas uses actual values while AIM uses stdDev around an optimal avg. One aspect of Zeev boxes I struggle with is outrageous bids. Limit buy orders a good distance below price without being so far away that they break support. That sounds like my understanding of what AIM does too. I think I need to take another look at AIM. I’m particularly interested in how it could build a box on top of a box. Or what causes box values to change. I guess that’s the buy sell safe values?