Alpaca Paper Trading With Trailing Stops and Ladders
Build or run an Alpaca paper-trading plan with rising stops, capped ladder buys, duplicate-order checks, and fill logs.
Before & after
Same prompt, same agent — the only difference is the skill.
I can help you think through a trailing stop strategy for paper trading. A trailing stop is an order that follows the price up but doesn't move down. If you set a 10% trailing stop and the stock rises from $100 to $120, your stop moves from $90 to $108. To automate this, you'd typically: - Use a broker API that supports trailing stop orders - Set your initial position size - Configure the trail percentage - Monitor during market hours Alpaca offers a paper trading API that's free to use, which is good for testing strategies without risk. Note that I can't execute trades — you'd need to run this yourself. And this isn't investment advice. Want help thinking through the parameters?
PAPER TRADING BOT — configured. Alpaca paper account, no real money. CONNECTION Endpoint https://paper-api.alpaca.markets Key + secret in env, not in the config file. Verify you're on paper before anything else — the live and paper endpoints take the same credentials shape and the only difference is the URL. ENTRY BUY AAPL market, position size $2,000 (paper) TRAILING STOP — up only, never down Trail 8% from high-water mark. Entry $224 → stop $206 Price to $240 → stop moves to $220 Price back to $228 → stop STAYS $220 The stop is monotonic. That's the whole mechanic. LADDER BUYS on drawdown from entry −15% ($190) → add $500 −20% ($179) → add $500 −30% ($157) → add $1,000 Each rung fires once. Trailing stop recalculates off the new blended cost basis after each fill. SCHEDULE Every 5 minutes, 9:30–16:00 ET, Mon–Fri. No checks outside market hours — a gap-down opens below your stop and no polling interval changes that. WHAT IT LOGS EACH TICK timestamp · last · high-water mark · current stop · rungs filled · unrealized P/L 14:35 228.10 high 240.00 stop 220.80 rungs 0/3 +1.8% THE THING THAT WILL SURPRISE YOU Ladder buys and a trailing stop pull against each other: laddering in on the way down raises your basis exposure while the stop is trailing off a high you're moving away from. Watch the first drawdown closely — that interaction is where paper trading earns its keep. Paper account. Illustrative configuration, not investment advice.
About this skill
Your stop can sell the position before your first ladder buy ever becomes reachable. A five-minute chat check can also miss a price move or submit the same order twice after a timeout. This skill turns your Alpaca paper strategy into explicit execution rules, catches those conflicts, and reconciles orders before taking the next action.
What it does
- Checks whether drawdown tiers can execute before the protective stop.
- Distinguishes Alpaca's native trailing stop from a fixed stop that a running executor periodically raises.
- Calculates ladder exposure, reserves pending purchases, and keeps stop coverage aligned with filled shares.
- Gives exits priority when a price gap crosses both a stop and a buy tier.
- Uses stable order identifiers and broker readbacks to avoid duplicate submissions.
- Defines market-calendar checks, restart behavior, and the requirements for actual recurring execution.
What you get
A concrete paper-trading specification with stop math, ladder quantities, a capital ceiling, and an order-state log. With an authorized Alpaca connection and a persistent executor, Claude can carry out and verify supported actions; otherwise, it provides the specification or inline implementation without claiming orders or schedules exist.
Best for
Retail traders testing a long stock position in an Alpaca paper account, especially when combining trailing exits, averaging down, and recurring monitoring.
SKILL.md preview
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name: alpaca-paper-trading-with-trailing-stops-and-ladders
description: "Build or execute a bounded Alpaca paper-trading strategy by reconciling broker state, checking stop-versus-ladder conflicts, ratcheting protection, and logging confirmed fills. Use when the user says 'set up an Alpaca paper bot', 'buy this stock with a trailing stop', 'add shares when it drops', 'check my position every five minutes', 'my ladder buys never trigger', 'my bot keeps buying twice', or 'review these stop rules'."
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# Alpaca Paper Trading With Trailing Stops and Ladders
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