Designed a deep alert-creation flow that stays simple. Casual users get price targets and percent changes in two taps. Power users get trailing alerts, MACD limits, bearish crossovers, and volume deviation triggers — clearly marked as premium, each with a plain-language explanation of when it fires. Every alert type ends at the same screen: choose your channels (push, email, text, phone call) and set it. One mental model, whatever your level.