data-vendor-cross-validation-for-backtests SKILL.md skillA
data-vendor-cross-validation-for-backtests from himanshuj16/algo-trading-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add himanshuj16/algo-trading-skills/data-vendor-cross-validation-for-backtests@v1.1.0Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- himanshuj16/algo-trading-skills
- Path
skills/data-vendor-cross-validation-for-backtests/SKILL.md- Versions recorded
- 5
- Latest version
- v1.1.0, committed Sep 3, 2026
- First version recorded
- Jul 30, 2026
- Size
- 7,067 bytes
- Repository stars
- 50
- License
- Apache-2.0
Use before trusting a single vendor's history, to cross-check OHLCV bars against a genuinely independent second source for price discrepancies, phantom volume, stale prints and missing-bar coverage.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## When to Use Invoke this skill before running production backtests on historical price data from a single vendor. Single-vendor data frequently contains silent errors: missing bars during exchange outages, incorrect OHLC values due to errata, phantom volume spikes from duplicate reporting, or stale prices from non-trading hours leaking in. Cross-validating against a second independent vendor catches these errors before they corrupt strategy performance metrics. ## When NOT to Use - **You only have one vendor.** This skill compares two datasets; it cannot detect an error that both copies of the same underlying feed share. Two resellers of the same primary source are *not* two independent vendors. - **The two feeds are not the same product.** A consolidated tape (all US venues) versus a primary-exchange-only feed will legitimately disagree on volume and on the closing print. Reconcile the product definitions first, or the report is all false positives. …
Read the whole file at its exact version.
How to install
mdr add himanshuj16/algo-trading-skills/data-vendor-cross-validation-for-backtests@sha256:a3e8df180aa080b1The line at the top of this page pins the label v1.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_pipzgsmxjkywkibf)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 30, 2026 and Sep 3, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-09-03 | 8527a51 | 7,067 B | A | view · diff |
| v1.1.0 | 2026-09-03 | 64e8b01 | 7,073 B | A | view · diff |
| v1.1.0 | 2026-08-23 | a0fdc9e | 7,030 B | A | view · diff |
| v1.0.0 | 2026-08-07 | 89d1436 | 2,934 B | A | view · diff |
| v1.0 | 2026-07-30 | dfc60c7 | 2,932 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7067 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
himanshuj16/algo-trading-skills · 50 stars · license Apache-2.0 · pushed 2026-09-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pipzgsmxjkywkibf GET https://markdownregistry.com/api/v1/resolve?ref=himanshuj16/algo-trading-skills/data-vendor-cross-validation-for-backtests GET https://markdownregistry.com/api/v1/blob/a3e8df180aa080b1cf1057c348d902cbc3e6c468737d6e2d3611239b3f83f159
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.