01 · Overview
What is PredictMirror?
PredictMirror adds a paper-trading panel to Polymarket pages, reads live order books, simulates fees and slippage, and records virtual positions and P&L in local browser storage. It does not connect a wallet or submit real orders, so the workflow is suitable for testing ideas rather than executing them. Simulation accuracy is provider-reported, and removing the extension can remove locally stored history.
02 · Best for
Who is PredictMirror best for?
Best for
Users testing market ideas and trading mechanics without risking funds.
Not ideal for
Users needing real execution, shared accounts or guaranteed simulation accuracy.
It is a simulation. Store claims about fee and slippage fidelity remain provider-reported, and uninstalling removes locally stored history.
03 · Access & execution
How do access and execution work?
Scope-aware product facts
What to look for
Surfaces
Access modes
Execution modes
Pricing offers
Data capabilities
04 · Data provenance
Data provenance
Current coverage: CompleteA transparent record of which official sources were checked and when.
05 · Public footprint
Public footprint
Current public signals from official platform sources, shown with their observation dates.
A transparent record of which official sources were checked and when.
06 · Sources & review
How was PredictMirror reviewed?
Documentation strength: CompleteA transparent record of which official sources were checked and when.
Official product sources were checked for documented identity, scope, access, pricing and limitations. This is not a security audit, performance test or endorsement.
07 · Alternatives
