Execution Intelligence

Everything you need to decide, monitor, and review an order lives under /v1/execution/*. These endpoints share the CC's book model, observation store, and TCA data — the same numbers that drive SOR routing are what you see here.

All endpoints require:

Authorization: Bearer seq_live_...

Pre-trade Forecast

Decision engine that answers before you submit:

• Expected cost (median outcome)
• Downside cost (P90 bad outcome)
• Fill confidence at each cost level
• Capacity curve — cost as a function of size
• Venue ranking with landed cost (book + fee + latency)
• Urgency tradeoff — how much you save by waiting

Query Parameters

Example

curl -H "Authorization: Bearer $KEY" \
  "https://api.sequencemkts.com/v1/execution/forecast?symbol=ETH-USD&side=buy&qty=10"

Returns a JSON object with the mid price, expected/downside costs, venue landed-cost ranking, capacity curve, and urgency tradeoffs.

Cold-resilient. On a cold ticker (one not in the edge's sticky subscription set), the handler runs the same fallback chain /v1/quotes uses — dynamic-subscribe + brief WS poll → edge-routed REST snapshot → venue public-API. First call takes ~200-500ms and returns real numbers; subsequent calls within the warm window are sub-ms. No explicit /v1/quotes warm-up is required. The same cold-fallback wraps /v1/intelligence/depth, /v1/intelligence/slippage, /v1/intelligence/routing, and /v1/orders/preview.

Scenario Simulator

Pre-trade comparison of multiple strategies for the same order — aggressive, passive, split — with estimated cost, fill rate, venue count, and time to completion for each.

Query Parameters

Uses the same book-walking engine as /forecast, applied under different strategy assumptions so you can compare side-by-side.

Live Monitor

The endpoint a trader keeps open during execution. Answers:

• Am I ahead or behind?
• Should I reroute?
• Should I get more aggressive?
• Which venue is deteriorating?

Path Parameters

Returns total qty, filled qty, fill percentage, remaining qty, per-fill breakdown, in-flight TCA, and venue-health signals while the order is live.

Post-trade Review

Consolidated post-trade analysis: one endpoint that returns:

• Order state — symbol, side, status, filled vs intended size
• Child-order timeline — each slice with venue, price, fill status, reject reason
• Decision audit — why SOR picked the actual venue, counterfactual best, selection error, forecast error, policy regret, model version
• Benchmark stack — slippage vs arrival mid, VWAP, TWAP, markouts
• TCA breakdown — cost decomposition when a TCA report exists for the parent

Use this as the single source of truth when answering "what happened on order X?"

Path Parameters

Desk Summary

Aggregated desk-level execution metrics over a time range, computed from the in-memory order store and TCA reports.

Returns: total orders, total fills, total notional, slippage percentiles, per-venue breakdown, per-symbol breakdown.

Query Parameters

Routing Decisions

The SOR decision log. Every time the router picks a venue / splits a parent, it writes a decision entry — this endpoint queries them.

Query Parameters

Useful for debugging "why did this order land on Binance instead of Kraken?" without opening the full review payload.

Related

• Analytics / TCA — aggregated venue-quality and cost-attribution reports
• Orders & Graphs — submit the orders that produce these observations
• Smart Order Routing — how the cost model feeds every /v1/execution/* endpoint