Agent skill

Add Indicator

by bennycode in bennycode/trading-signals

Guide for implementing technical indicators in the trading-signals package by reusing the shared base classes, utilities, and test infrastructure, and by verifying results against well-known…

No licenceAuto-check passedBusiness, Finance & HR

Install Add Indicator

skills CLI
$ npx skills add bennycode/trading-signals --skill add-indicator -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install bennycode/trading-signals add-indicator --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/bennycode/trading-signals.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/add-indicator .claude/skills/add-indicator && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
add-indicator
GitHub stars
994
Token cost
~876 tokens
SKILL.md length
450 words
Files
1
Skills in repo
2
Repo updated
First seen
Licence
None found

At a glance

Guide for implementing technical indicators in the trading-signals package by reusing the shared base classes, utilities, and test infrastructure, and by verifying results against well-known…

  • Works in 4 steps: Tulip Indicators: its repository ships a… → TA-Lib: match emissions bar-for-bar… → Skender.Stock.Indicators: usable for… → …
  • Port an indicator
  • SKILL.md covers Reuse the base classes, Reuse the test infrastructure and Verify against a well-known…
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Add Indicator is an agent skill from bennycode/trading-signals. Guide for implementing technical indicators in the trading-signals package by reusing the shared base classes, utilities, and test infrastructure, and by verifying results against well-known reference implementations (Tulip Indicators, TA-Lib, Skender). Use when asked to add, implement, or port an indicator.

Its SKILL.md is about 880 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Business, Finance & HR, covering Trading and backtesting. It works with TypeScript. The repository describes itself as: Technical indicators to run technical analysis with JavaScript & TypeScript. 📈.

When your agent uses it

  • Port an indicator
  • Tasks that involve Trading and backtesting

Example prompts

  • “/add-indicator”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Tulip Indicators: its repository ships a test data file with inputs and expected outputs for every indicator it supports. Match to three…
  2. TA-Lib: match emissions bar-for-bar against its C sources, including the lookback. Preferred for Ehlers-style indicators that Tulip does…
  3. Skender.Stock.Indicators: usable for pure-window math only. Its EMA-style recursions seed from an SMA while this library seeds from the…
  4. No reference implementation available: search the web for published test vectors first. Worked step-by-step examples often exist on…

What it can do on your machine

Read from SKILL.md and the folder at commit 9e425e6. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • github.com
    • tulipindicators.org
    • ta-lib.org
    • en.wikipedia.org
    • investopedia.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Add Indicator loads about 876 tokens when it runs. Until then it costs about 81 tokens; SKILL.md has 450 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~81
When it runs · the whole SKILL.md, loaded when a task matches
~876

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 450 words (~876 tokens).

“The step-by-step recipe and all coding conventions live in the trading-signals package's CLAUDE.md and are the authority. This skill covers the three habits that make an implementation land on the first review: reuse the base classes, reuse the test infrastructure…”

— opening of SKILL.md by bennycode
name
add-indicator

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/add-indicator of bennycode/trading-signals.

Open the folder on GitHubat commit 9e425e6

Compare with similar skills

Add Indicator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Add Indicator compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Add Indicator this skillbennycode/trading-signals994—~876Automated safety check: PassNone
Okx Cex Marketdex-original/okx-agent-trade-kit1091 repos~2.7kAutomated safety check: PassMIT
Polymarket Tennislivetennisapi/livetennisapi-mcp152—~3kAutomated safety check: PassMIT
Okx Cex Smartmoneydex-original/okx-agent-trade-kit1091 repos~1.4kAutomated safety check: PassMIT
Okx Sentiment Trackerdex-original/okx-agent-trade-kit1091 repos~3.8kAutomated safety check: PassMIT
Polymarket Profilerunesleo/polymarket-toolkit194—~3.7kAutomated safety check: PassMIT

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Works with

Questions about Add Indicator

What does Add Indicator do?

Guide for implementing technical indicators in the trading-signals package by reusing the shared base classes, utilities, and test infrastructure, and by verifying results against well-known…. Add Indicator is an agent skill from bennycode/trading-signals. Guide for implementing technical indicators in the trading-signals package by reusing the shared base classes, utilities, and test infrastructure, and by verifying results against well-known reference implementations (Tulip Indicators, TA-Lib, Skender).

When should I use Add Indicator?

Add Indicator fits situations like: port an indicator; tasks that involve Trading and backtesting.

How do I install Add Indicator in Claude Code?

Run `npx skills add bennycode/trading-signals --skill add-indicator -a claude-code`. Or copy the skill folder (.claude/skills/add-indicator in bennycode/trading-signals) into .claude/skills/add-indicator in your project. Claude Code loads it when a task matches its description.

How do I install Add Indicator in Codex?

Run `npx skills add bennycode/trading-signals --skill add-indicator -a codex`. Or copy the skill folder (.claude/skills/add-indicator in bennycode/trading-signals) into .agents/skills/add-indicator in your project. Codex loads it when a task matches its description.

Can I use Add Indicator in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add bennycode/trading-signals --skill add-indicator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/add-indicator, .gemini/skills/add-indicator, .github/skills/add-indicator and .opencode/skills/add-indicator in your project.

What does Add Indicator need to run?

SKILL.md names no scripts, command-line tools or credentials: Add Indicator is instructions for the agent only.

Does Add Indicator access the network?

SKILL.md names 5 domains. As links in the text: github.com, tulipindicators.org, ta-lib.org, en.wikipedia.org and investopedia.com. This is read from the text; nothing was executed.

Is Add Indicator safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Add Indicator use?

No licence was found for Add Indicator or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Add Indicator use?

About 876 tokens (SKILL.md is roughly 3.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Add Indicator?

Skills that share tags, products or a category with Add Indicator: Okx Cex Market (dex-original/okx-agent-trade-kit, 109 stars), Polymarket Tennis (livetennisapi/livetennisapi-mcp, 152 stars), Okx Cex Smartmoney (dex-original/okx-agent-trade-kit, 109 stars) and Okx Sentiment Tracker (dex-original/okx-agent-trade-kit, 109 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Add Indicator?

bennycode (a GitHub user) maintains it in bennycode/trading-signals, which has 994 GitHub stars. The repository holds 2 skills in this directory. The repository was last updated on October 7, 2026.

Source: bennycode/trading-signals on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.