Most 0DTE call services show you their winners. We wanted the opposite: an engine that calls a trade only when its gates line up, and shows its work every time, including the days it says no.
The 0DTE alert world runs on screenshots of winning trades. You rarely see the losers, the days nothing set up, or the reasoning behind a call, so there's no way to tell a real process from a lucky month. We wanted a record anyone could check.
Every change to the engine's rules is tested against more than five years of intraday SPX option chains before it goes live. Most ideas fail that test. We publish the failures too, on the Research page, because a list of what didn't work says more about a process than a list of wins.
The engine keeps the reasons for what it did, down to the number that tipped each gate. If a call can't be reconstructed after the fact, it shouldn't have been made.
Traders who already know what a same-day option can cost them and want a disciplined, rule-based read on the session. It isn't a tip line, and it won't tell you how much to trade.
Synapse publishes the same calls to everyone and is not personalized investment advice. Same-day options can lose their full value within hours.