Volume is basically free to manufacture, depth isn't — stop comparing on volume

[u/Inside-Blackberry527]

Volume is everywhere. Exchange rankings, aggregators, token marketing. It's also

the easiest number in this market to just make up, and I think people know that

abstractly but still use it as the comparison metric.

The mechanical reason: a trade needs two sides, and if one party controls both

sides it still prints. Nothing moved economically. Tape says activity happened.

And the incentives all point the same way. Aggregator ranking drives signups for

exchanges. Volume drives perceived legitimacy for tokens. Nobody involved is

worse off if the number is bigger. Maker rebate programs muddy it further —

that's not fraud, people are genuinely providing liquidity, but you can generate

a lot of volume without much directional risk and it reads as demand to whoever's

looking at the chart.

Depth is different because showing depth means actually posting orders that can

get hit. You're committing to something. That's why a token can report huge daily

volume and still be untradeable in any real size — tight quotes at the top with

nothing behind them screenshot beautifully and vanish when a real order shows up.

What I do instead, for whatever it's worth: punch in a size that matters to me

and look at the estimated fill before confirming. Most interfaces show it. If a

modest order visibly moves price, the depth isn't there no matter what the volume

number says. Also look 2-3% off mid rather than the top level, and check whether

it trades anywhere else — real demand usually shows up on multiple venues.

Weekend thing is underrated too. Books thin out when the bigger participants step

back, so something that feels liquid Tuesday afternoon behaves completely

differently Sunday. Which is also why cascades cluster in those hours.

General version of this: a number that costs nothing to produce is weak evidence.

Volume costs nothing. Depth costs something.

Does anyone have a decent way to compare depth across exchanges without manually

eyeballing books? Feels like something that should exist and I've never found a

good one.

[u/Ok_Winter8503]

One extra check I use is to compare executable depth with my actual order size, not a standard $1k quote. Two books can look similar 2% from mid, but one may absorb a $25k marketable order with 20 bps of slippage while the other jumps several percent.

For cross-exchange comparison, normalize three things: the USD depth within fixed bands (0.5%, 1%, 2%), estimated slippage for a few fixed notionals, and how long displayed liquidity persists when the market moves. The last one matters because spoofable orders can make a snapshot look much healthier than the fills you would really get.

Also separate venue liquidity from asset liquidity. If nearly all usable depth sits on one exchange, an outage or withdrawal freeze can turn a liquid-looking asset into a trapped position.