Rules should be transparent — so should signals
Limitup is a rules-based scanner for the US stock market built for halal investing. The goal is simple: every signal should be able to explain why it fired.
Why this exists
Muslim investors in the US stock market face two problems at once: which stock is even halal, and when entry/exit actually makes sense. Many products sell this as a "signal" while staying a black box. We built the opposite — both the screening rule and the strategy logic are open.
Three principles
No black box
Every signal is the output of an explicit rule (indicator + condition), not "the AI decided so". Each strategy's logic is documented on the homepage.
We don't hide the limits
That a signal isn't a guarantee, that paper trading is a simulation, and that past results say nothing about the future — all stated plainly on the homepage. It doesn't lower trust; it earns it.
Halal screening is the universe itself
It isn't a toggle-on filter: every stock the scanner watches has passed our own screener against AAOIFI Standard No. 21. Full methodology: /methodology.
Current status — stated plainly
The project is under active development. Signal strategies, paper trading, watchlists, alerts and the journal all work today. Paid plans (Pro/Premium) are currently shown for reference only — billing isn't wired up yet, so everything is free. Live (real-money) trading doesn't exist yet.
Have questions?
Read the methodology, or reach out directly.