Risk Management When Your Trading System Thinks for Itself

An autonomous trading system that can think for itself can also lose for itself. The risk management architecture is not a feature — it's the product. Without it, you don't have a trading system. You have an expensive random number generator with a brokerage account.

RAJA uses a multi-layer circuit breaker system. The first layer enforces per-trade risk limits at the order level — the system physically cannot submit an order that exceeds the threshold. This is non-negotiable and enforced in hardware, not policy.

The second layer monitors portfolio-level drawdowns in real time. If the combined portfolio drops beyond our intraday limit, all new positions are halted. Existing positions run with protective stops, but no new risk is added. This prevents the classic death spiral where a system tries to "recover" losses by increasing exposure.

Layer three: weekly position limits. No more than 30% of total equity can be deployed at any given time. This ensures that even if multiple correlated positions move against us simultaneously, the maximum portfolio impact is bounded.

The most important design decision was making these circuit breakers hardware-enforced rather than software-enforced. The breaker logic runs in a separate process from the trading logic. Even if the trading daemon crashes, hangs, or enters an infinite loop, the circuit breakers continue operating independently.

Autonomous trading systems fail not because the AI is wrong about the market. They fail because the risk management was an afterthought. Build the cage first, then put the intelligence inside it.

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