ARM today looks like QDEL did in Jul 2020
ARM's chart over the last 30 trading days is a 80% shape match for QDEL in Jul 2020 — its closest historical analog across a decade of market data. In the 15 trading days after that point, QDEL went -5%.
The forward path is QDEL's actual history after that date — not a prediction for ARM. A close shape match is a starting point for research, not a signal. Different stocks with similar charts can do very different things next.
How we find the twin
We embed ARM's recent daily chart into a 256-dimension shape vector and search millions of historical chart windows for the nearest match by shape, then re-score the finalists on the exact window shown so the lines actually overlap. The match is amplitude-aware, so it's a real twin — not just "both went up."
See ARM's full cohort of historical analogs — the distribution of what they all did next, with calibrated confidence:
ARM cohort →Open in Chart Library