Execution audit / 01


Analyse a file or try the sample

Observability for the bots that trade for you — Hummingbot, Freqtrade, or your own code on Bybit, Binance and OKX. They move real money and run with almost no instrumentation. Drop in a fill history export and Vexxsus takes the result apart: fees, maker/taker premium, fragmentation, timing, and the price spread inside a single order.

Execution map

One live account · 1,020 fills · 5 weeks

Volume traded

$165,964

Fees paid

$128.79

Avoidable premium

$68.41

Per $1M traded

$412.20

Fragmentation

46%

Worst order

23 fills

Run it / 02


The engine ships with the page and runs in this tab. Open the network panel, drop a file, watch the counter stay at zero. A fill history never leaves the machine it is on, because there is nowhere for it to go.

The figures at the top of this page are real.Measured on one live account with the owner's permission: 1,020 fills, 38 instruments, five weeks, $165,964 traded on Bybit perps. Nothing there is modelled. The sample button below is the exception and says so — it generates an export so you can see the report without having a file to hand.

Drop a fill history export

Tested against Bybit, Binance and OKX exports and against Hummingbot and Freqtrade logs. Other venues go through a generic CSV reader that guesses the columns — usually right, and it tells you when it is not sure. No API key, no account.

Off-origin requests0

What it measures / 03


Measure

Read every fill and price it against your own maker rate.

Attribute

Split the cost by instrument, by hour, by strategy.

Act

A ranked list of what to fix, ordered by what it costs you.

What each input answers / 04


A fill export records what happened, not what the book looked like at the time. That line decides what is answerable from a file alone, what needs the agent, and what nobody can compute at all.

11

from one file, offline

11

more with the agent

4

nobody can answer

Every metric, and which tier it sits in

Why nothing exists / 05


Institutional TCA is sold on annual contracts to funds with compliance departments. Trade journals are built for a person clicking buy a few times a day. Between them sits everybody running a bot, and nobody has built for them.

20yr

institutional TCA, enterprise-priced

0

journals that measure execution

1

segment nobody serves

Who this is for, and why the gap is there

What we can see / 06


Every tool that touches trading data promises to be careful. A promise is worth nothing, so this is architecture: fills are never sent, history is sealed before it is stored, and the few numbers that do leave cannot be traced to an account.

0

fills that reach us, at any tier

8

rounded numbers, the whole payload

20

accounts before a cohort returns

The three layers, and the payload printed in full

Pricing / 07


The first audit is free, because seeing the number once is the whole argument. What you pay for after that is continuity — execution drifts, and you find out the same way you found out the first time, which is to say not at all.

$0

free — one audit · no account

$29

starter — one account

$99

desk — several accounts

All four tiers, and what each one adds

Hear when the agent ships

The agent is what the paid tiers add: it reads your exports on a schedule and prices your fills against the market. Leave an email or a Telegram handle and you will hear on the day. One message, then nothing.

Stored on our own server, never passed to anyone, deleted on request. No fill data is attached to this.

Find out what yours costs.

A fill history export from any venue. Read, analysed and rendered in this tab — about a second for a few thousand fills, and still nothing uploaded.

Analyse a file