Brokey For Amibroker ((install))

1. Overview

Brokey (also referred to as "The Brokey Indicator" or "Brokey System") is a community-developed, volatility-adjusted momentum indicator for AmiBroker. It is not a native built-in AFL (AmiBroker Formula Language) function but rather a scripted indicator designed to identify trend strength, breakout points, and potential reversals.

Unlike standard momentum oscillators (RSI, Stochastics), Brokey incorporates volatility normalization — typically using Average True Range (ATR) — to adapt to changing market conditions. brokey for amibroker

8. Optimization Tips for AmiBroker

• Use Param() statements to optimize Period and ATRPeriod with AmiBroker’s built-in Optimizer.
• Combine with volatility filters — e.g., only trade when ATR(20) > ATR(50) to capture volatile regimes.
• Add time filters — avoid Brokey signals in the first 30 minutes of market open (for intraday).
• Use with Composite (Foreign) symbols — apply Brokey on a higher timeframe index to filter signals on individual stocks.

Pitfall 2: Ignoring Trading Halts

Symptom: The backtest sells instantly at the delist price. In reality, when a stock is broken, it often halts trading. You cannot sell. Fix: Modify your Brokey CBI to impose a random slippage of 50-100% on delisted trades. Or, treat the position as zero – you lose all capital and cannot exit. Use Param() statements to optimize Period and ATRPeriod

Part 5: Advanced Brokey Strategies – Beyond Simple Delisting

Once you have the basic Brokey setup, you can move to pro-level techniques. when a stock is broken

How to Detect "Brokey" Data in Amibroker

You don’t need to buy expensive plugins to find this. Amibroker is powerful enough to catch these errors natively.