A worked distinction
An order for 100,000 units at 0.10 USDT has 10,000 USDT notional. An order for one unit at 10,000 USDT has the same notional, despite the large difference in base quantity.
What to verify in your own analysis
Keep buy/sell sides, price ranges and quote units explicit. Summing all fetched levels can compare unequal distances from mid-price if providers return different depth coverage.
Write down the market or protocol identifier, units, observation window and data source before comparing outputs. Keep unavailable values distinct from zero. Capture a baseline and change one assumption at a time so the resulting difference can be explained.
Use the linked working tools
Open the related tools below to inspect actual public observations or calculate a local scenario. The numerical example above is illustrative, not a current quote. Export the result together with its assumptions if you need a reproducible research record.
The review checklist records what you checked in this tab. Completion measures your own notes, not whether an investment is safe, suitable or profitable.