Waiting for a pullback on this high-flying stock could end up costing you.Companies at the forefront of artificial intelligence innovations can see rapid swings in their share prices. Stocks can zoom higher on strong earnings, and that momentum can carry the stock for weeks or months. It's extremely tempting to wait for a pullback in the share price when that happens, but waiting could cost you.One recent example of an AI stock that's soared higher in a short period of time is Adobe (ADBE -1.05%). Shares tr ...