Why you should know this
Without a benchmark and record, traders cannot tell whether results came from market direction, execution skill, fees or luck.
This is not about being told which trade to take. We are learning how to inspect the mechanism together, so a later decision is more deliberate and reviewable.
The short answer
This lesson turns the mechanic into a pre-trade execution check covering price control, cost, fill risk and the reader’s next action.
Begin with the decision record
Capture before submission:
- pair and venue;
- buy or sell;
- intended quantity;
- decision timestamp;
- best bid, ask and midpoint;
- visible depth;
- order type and limit;
- expected fees;
- reason and urgency.
After execution, capture every fill, fee, remainder, cancellation and final usable amount. Without the before-state, most cost analysis becomes guesswork.
Effective spread
Effective spread compares execution with the midpoint near execution. A common form is:
Effective spread = 2 × Direction × (Fill price − Midpoint)
Use Direction = +1 for buys and −1 for sells so a positive result represents cost.
If midpoint is ₱99.50 and buy fill is ₱100:
2 × 1 × (100 − 99.50) = ₱1.00
As a percentage of midpoint:
₱1 ÷ ₱99.50 × 100 ≈ 1.01%
This estimates the round-trip spread implied by the execution relative to midpoint. It is not the same as total cost.
The QUALITY review
- Q — Quantity: intended, filled and remaining.
- U — Unit: base, quote and final usable currency.
- A — Arrival: bid, ask, midpoint and timestamp.
- L — Levels: average and worst fill through depth.
- I — Included costs: fees, funding, transfer and Withdrawal.
- T — Time: acknowledgement, fill and completion.
- Y — Yield no excuses: compare process, not only profit or loss.
Common mistakes
- Using last price without side or timestamp.
- Averaging fills without quantity weights.
- Ignoring unfilled opportunity cost.
- Calling fast execution good despite poor price.
- Comparing different pairs and sizes as if identical.
- Excluding transfer and final PHP costs.
- Declaring venue superiority from a tiny sample.
- Changing benchmarks after seeing the result.
A no-money execution lab
Use the 1,500-unit example. Recalculate shortfall if the unfilled 500 is later valued at ₱99 instead of ₱103. Then compare a full fill at ₱102 with the partial fill.
State which result is better for an urgent task and for a patient price-controlled task. The answer can differ because objective belongs in the scorecard.
A familiar Philippine or Asian example
A learner in the Philippines studies a fictional crypto quote and writes the pair direction, intended action, price control, estimated cost, possible fill problem and exit plan. The exercise uses paper values only. No order is placed.
One risk or limitation
Examples simplify execution. Real venues differ in order logic, trigger source, fees, tick and lot sizes, available liquidity and outage handling. A checklist can reduce avoidable mistakes, but it cannot guarantee a price, fill, exit or profit.
How this connects to market mastery
Market mastery includes execution discipline. A strong market view can still fail when the pair, order type, size, liquidity, fee or exit mechanics are misunderstood.
Quick check — no money needed
Use a fictional quote. Write the pair, buy or sell action, order type, price control, size, estimated fees, liquidity concern and the condition that would cancel the plan. Then explain which field protects you from the largest avoidable mistake.
If you can explain your answer and name the main limitation, this lesson is complete.
*Cryptocurrency and virtual asset transactions are highly volatile and irreversible, may result in significant losses, and do not guarantee returns; customers should trade only after understanding the risks involved.
