Educational worksheet · spotmarketdesk.online · Updated 23 October 2026

Prop Fill Reviews: Bid, Ask and Last Trade Are Different Benchmarks

Bid, ask and last trade can be different at the same instant. Choose the relevant benchmark definition before calculating execution differences. A later fill should retain its own price and quantity instead of being replaced with a convenient market field.

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Save the full benchmark observation

Record symbol, side, time, price field and quantity scope. A best quote describes a particular displayed side and level; a last-trade price describes a previous matched event. Neither record by itself guarantees what your order would receive.

In a Singapore diary, retain the original instant beside the UTC+8 display. Observations with different times should not be labelled simultaneous merely because their timestamps were rounded to the same minute. Precision and clock meaning remain part of the evidence.

Work a fictional buy-side comparison

Suppose a supplied snapshot shows bid 99.90, ask 100.10 and last trade 100.30. Midpoint is 100.00. A later fictional buy fill at 100.15 is 0.05 above the supplied ask benchmark and 0.15 above midpoint, with the observation gap still retained.

For 50 filled units, those differences scale to 2.5 and 7.5 quote units respectively. They are two benchmark comparisons, not two separate fees. No exit is supplied, so neither value establishes a completed trade profit. Actual costs remain additional ledger inputs.

Fictional snapshot and later buy fill
FieldPriceInterpretation
Bid / ask99.90 /100.10Supplied two-sided snapshot
Midpoint / last100.00 /100.30Different benchmark fields
Later buy fill100.15Separate execution observation
50-unit differences2.5 above ask;7.5 above midpointBenchmarks, not two fees

Keep account valuation and benchmarks separate

This site’s earlier price-field resource remains the companion. An evaluation can use its own defined account valuation; a benchmark quote is not a substitute. Review HashHedge’s current product and account conditions before interpreting the actual account state.

The optional sponsored link offers current programme information. No live quote, fill quality or latency advantage is asserted. The worked comparison sends no order and makes its chosen benchmarks visible before any conclusion is drawn.

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