# Opentradex Buy

> Open a paper long position on any enabled rail — Kalshi, Polymarket, Alpaca, or Coinbase. Invoke when the user says "buy", "go long", "paper long", "yes on <market>", or confirms a suggested entry. Requires rail, symbol, qty; price is optional (defaults to a mid-market mark).

- Skill: `deonmenezes/opentradex-buy` (Agent Skill)
- Install (CLI): `npx skillmds@latest add deonmenezes/opentradex-buy`
- Raw SKILL.md: https://api.skillmd.com/api/skills/deonmenezes/opentradex-buy/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: deonmenezes (https://skillmd.com/u/deonmenezes)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/deonmenezes/opentradex-buy

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# OpenTradex — Paper Buy

Open a long paper position.

User arguments: `$ARGUMENTS` — expected form `<rail> <symbol> <qty> [price]`.

## Flow

1. Validate the user gave you all four pieces (`rail`, `symbol`, `qty`, optional `price`). If anything is missing, ask for exactly what's missing in one short sentence — don't re-ask fields the user already gave.
2. **Pre-trade risk check:** quote the open position count and current exposure:
   !`node "${CLAUDE_PLUGIN_ROOT}/bin/tradex.js" risk`
   If `openPositions ≥ 5` or `dailyTotal ≤ -50`, warn the user and confirm before proceeding.
3. Place the paper buy:
   !`node "${CLAUDE_PLUGIN_ROOT}/bin/tradex.js" buy $ARGUMENTS`
4. Echo the fill price, position id, and remind the user: "To close: `/opentradex-trade:sell <position-id>`."

## Rules

- This is paper-only. Never claim real fills.
- Price units: prediction markets (Kalshi/Polymarket) use 0–1 (probability); stocks (Alpaca) and crypto (Coinbase) use raw currency.
- If the rail isn't enabled, tell the user to run `/opentradex-trade:onboard` first.