/slippage-cost
Slippage analysis on an executed-fills CSV. For each fill, pulls the NBBO at the fill timestamp, computes slippage versus the inside quote and session VWAP, and flags fills that crossed the spread, traded off-NBBO, paid through a wide spread, or showed adverse selection in the
$ npx -y skills add rgourley/quant-garage --skill slippage-cost --agent claude-codeHow it fires
How this skill gets triggered: by you, by Claude, or both.
- Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.
- You can call itInvoke it directly when you want it.
- Slash command
/slippage-cost
Context preview
The summary Claude sees to decide when to auto-load this skill.
Slippage analysis on an executed-fills CSV. For each fill, pulls the NBBO at the fill timestamp, computes slippage versus the inside quote and session VWAP, and flags fills that crossed the spread, traded off-NBBO, paid through a wide spread, or showed adverse selection in the
Trade like a pro. Without the terminal. View the full landing page → Quant and equity research tools that run inside Claude, or behind your own UI.
Other skills on quant-garage.
- /8-k-scanner
Scan SEC 8-K disclosures across a single ticker or a watchlist using Massive's pre-parsed disclosure taxonomy. Groups the underlying rows by filing (one 8-K carries N tagged Items), ranks by signal bucket (M&A / Restatement / Material agreement / Regulatory / Leadership change /
Open skill - /analyst-tracker
Track sell-side analyst positioning on a name via Benzinga Analyst Ratings. Pulls every rating event over the lookback window, classifies each as upgrade / downgrade / initiation / reiteration / drop-coverage / PT-change, aggregates the latest rating and price target per firm,
Open skill - /backtest-data-prep
Build a clean, point-in-time, ready-to-backtest OHLCV dataset for a US equity universe across an arbitrary date window. Emits parquet plus a manifest plus an edge-case log, with corporate actions reconciled, survivorship treatment documented, holidays and half-days preserved
Open skill - /change-point-detector
Bayesian Online Change-Point Detection (BOCPD) on a ticker's daily log returns. Detects points in time where the return-generating distribution changed (regime shift in mean, vol, or both), reports the confidence at each detected boundary, and emits per-segment statistics
Open skill - /commodity-cycle
Single-commodity macro read. Answers "is this commodity in a winning or losing macro setup right now" and names the macro driver that dominates it. Pulls one commodity ETF (default GLD; accepts SLV, USO, DBC, or any commodity ETF) plus the macro context it needs (UUP for the
Open skill - /corp-actions-reconciler
Reconcile a position file against splits, dividends, and spinoffs to catch breaks before they hit P&L or T+1 settlement. Use when an operator hands over a CSV of positions and asks "are these right after the recent corporate actions." Runs on a free Massive Basic key.
Open skill