Quote timeline
Quote vs Trade Timeline for Options
A quote versus trade timeline shows the market around the trade instead of relying on a single final print.
Use quote timelines to compare bid, ask, midpoint, and trades through time. This helps validate whether a fill assumption was plausible at the modeled entry and exit.
Quotes show the market
Quotes show where buyers and sellers were posted. For backtests, they tell you whether the modeled fill was inside, near, or through the spread.
Trades show prints
Trades show executed prices and sizes. They are useful evidence, but a print can be stale relative to the current quote.
Use both together
A serious research workflow stores quote and trade timelines around each decision point, then rejects entries where the evidence does not support the fill.
Quote vs Trade Timeline
Bid, ask, midpoint, and prints show why last price alone is fragile.
Bid/Ask Spread by Strike
Lower bars usually produce more defensible fill assumptions.
Evidence checklist
What to record before trusting an options research result
The pages in this cluster are intentionally practical: a backtest, scanner, or dashboard should preserve the evidence that made each contract eligible and each fill plausible. The table is the minimum audit trail for option-specific execution realism.
| Check | Evidence to keep | Docs |
|---|---|---|
| Contract universe | Historical contract identity, listed expiration, strike, call/put type, and as-of contract metadata. | /docs/contracts |
| Executable market | Bid, ask, midpoint, quote timestamp, quote size, and stale-quote handling around the decision time. | /docs/quotes |
| Trade confirmation | Nearby prints, sizes, exchange/condition codes, and whether prints support the assumed fill level. | /docs/trades |
| Liquidity gate | Spread percent, volume, open interest, DTE, IV, and whether the contract should have been eligible. | /docs/option-chain |
Related tools and docs
Backtest Realism Checker
Score contract, quote, trade, and spread assumptions before trusting a backtest.
Options Slippage Calculator
Translate bid/ask assumptions into dollar drag and breakeven movement.
Options Liquidity Scanner
Rank contracts by spread, volume, open interest, IV, and quote context.
Put/Call Ratio Dashboard
Track the current market put/call ratio beside weekly history across the last few years.
Options Chain Visualizer
Inspect heatmaps, IV smile, spread by strike, and volume versus open interest.
Why options backtests fail
Audit stale contracts, last-price fills, quote gaps, liquidity filters, and execution timing.
Options slippage modeling
Model midpoint, near-side, and marketable fills from bid/ask spreads and contract size.
Mid price vs fill price
Separate a reference midpoint from the executable fill assumption used by the strategy.
Bid/ask spread backtesting
Use spread width as both a liquidity gate and a cost input for every modeled entry.
Quote vs trade timeline
Validate fills with synchronized bid, ask, midpoint, and print evidence around each decision.
Options data API
See the full API surface behind these tools.
Historical options data API
Use contracts, quotes, trades, and aggregates for research workflows.
Options backtesting API
Plan historical contract and quote-aware fill sequences.
Quotes docs
Review bid/ask history fields used by realism checks.
Option chain docs
Inspect chain snapshots with Greeks, IV, volume, and open interest.