docs/Model77.md

Analyst Revision Momentum (Conceptual — PV Proxies Only)

Analyst consensus upgrades predict future price drift. When a large number of analysts revise estimates upward, institutions position ahead of the revision — creating volume and price signatures that are detectable in Price-Volume data before the news is public.

PV proxies for analyst revision dynamics:

• Unusual volume as leading indicator: Institutional accumulation ahead of upgrades produces above-average volume. Proxy: volume / adv20 — sustained elevation over 5–10 days precedes upgrades.
• Price gap vs. VWAP: Institutional buying pushes the close above the VWAP, creating a positive spread. Proxy: (close - vwap) / (vwap + 1e-6) — positive values indicate institutional demand.
• Return median deviation as momentum proxy: Strong upward revision momentum shows up as mean-vs-median divergence. Proxy: ts_mean(returns, 5) - ts_median(returns, 20) — positive = short-term drift.
• Momentum persistence after analyst cluster: Stocks that have already drifted up on low volatility tend to continue. Proxy: ts_mean(returns, 21) / (ts_std_dev(returns, 21) + 1e-6) — Sharpe ratio of returns.

Expression building blocks (PV only — safe operators):

rank((close - vwap) / (vwap + 1e-6))                       # VWAP deviation rank
rank(ts_mean(volume / adv20, 10))                           # sustained volume elevation
ts_mean(returns, 5) - ts_median(returns, 20)                # mean vs median momentum
rank(ts_mean(returns, 21)) / (rank(ts_std_dev(returns, 21)) + 1e-6)  # normalized drift
signed_power(rank((close - vwap) / (vwap + 1e-6)), 0.5)    # nonlinear VWAP signal