For a solicitor who has never sat in that queue: the useful question is not whether an alert was closed. It is whether anyone reconstructed the orders, or closed the story the platform told.
01
Detection
A surveillance scenario fires — spoofing, layering, wash trading, ramping, an off-market print, activity into a fix, last look, a lexicon hit in chat — or someone on the desk, in the first line or in the second line, spots it by eye. Sometimes the first notice is an exchange query, a client, or the FCA.
02
An alert is born
The platform opens a case, scores it, and drops it in a second-line (2LOD) queue. A clock starts. Under the Market Abuse Regulation, if suspicion is later formed, a STOR must go to the FCA without delay. This is not an open-ended file.
03
Triage
Duplicate, known false positive, or real work? Market-making inventory, a disclosed client fixing order, a hedge into a barrier, thin holiday liquidity — all can look like abuse on a crude scenario. Weak scenarios waste months. Weak triage closes the interesting ones.
04
The file, not the alert text
If it survives triage, the analyst should pull the orders and trades, not the narrative the machine wrote. Life of the order, size, venue, cancels, fills, the other side of the book, the pair, the time of day. Chats and voice if the typology needs them. The question is always: was this the market of that second, or an attempt to make a market that was not there?
05
Context from the business
The first line (1LOD) can explain what the desk thought it was doing. They must not write the conclusion. Independence is the point of the second line sitting off the desk.
06
A decision
Close as legitimate or a false positive. Close as explained, with residual risk — those should be QA’d. Escalate: internal investigation, employee referral, a market observation, or a STOR. Or keep the file open and watch.
07
The closure write-up
This is the document a solicitor later sees. It should say what was looked at, what was not, and why the activity was or was not consistent with legitimate behaviour. In practice, many closures describe the alert, not the orders. That is the gap a first-line independent review is for: read the tape again, ignore the write-up, and say whether the closure is supported.
08
After the click
Sample QA inside the second line. Sometimes the first line independently samples second-line closures. Scenario tuning. Record keeping. A close is not the end if new facts appear — suspicion can still crystallise, and a STOR can still be due.