Release notes

Releases summary

Misc

• We have fixed slow loading of reports built on tick and top of book data. Some of them could take minutes to return, and they are back to their normal speed.

---

What's new

• Margin probe endpoint — Added a public endpoint that checks the margin requirement for a candidate order without placing it. It returns current equity, required margin with and without the order, and whether the order would be accepted; market, limit and stop orders are supported, with an optional position ID for netting against a specific position. 
• ClickHouse export target — The export subsystem now writes to ClickHouse as well as PostgreSQL. A ClickHouse pipeline needs no cursor table, and every exported row carries three service columns the server fills itself: sender_id, sequence and batch_time. 
• ClickHouse server failover — A ClickHouse pipeline now takes a list of servers instead of a single connection. The exporter moves to the next server immediately on a connection or transient insert error and backs off only after every configured server has failed in a row. 
• Client events export — Client lifecycle changes are now exported as an ordered event log — upsert, delete and resync markers — so the full history of a client can be reconstructed from its creation through every modification to its removal. 
• Export snapshot on demand (admin) — Added an admin endpoint that triggers a full snapshot resync for a chosen entity type: trading accounts, clients, groups or symbols. The call is asynchronous and returns 202 Accepted once the request is queued. 
• Market data delay configuration — Symbols now carry a market data delay interval in whole minutes and a delay mode (Realtime or Delayed), both readable and writable through the admin API and over the admin WebSocket. Group profiles can override the delay mode for the symbols they cover. This release adds the configuration only — the settings are stored and returned but do not yet affect quote distribution; the delayed feed itself follows in a later release.
• Per-specification request body limits — MaxRequestBodyLength now defaults per API specification — 16 MB for admin endpoints, 1 MB for user endpoints — with a 256 MB ceiling. The default request deadline (SocketTimeout) has been raised to 31 seconds so that large admin payloads remain deliverable. 
• New API error codes — The public and admin APIs can now return Duplicate name, Not configured and Not implemented error codes. 

Misc

• Documentation — The export setup guide covers the ClickHouse pipeline, its table scripts and the client events schema. The endpoints configuration reference now documents the request deadline and request body size rules, including the effective cap logged at startup.

---

Bug fixes

• We have fixed an issue where unsaved changes on the liquidity pool symbol configuration page were not kept if one of the symbol descriptions contained a non-breaking space. The page now saves the draft as expected, and the spurious "value is not allowed" warning no longer appears.

---

What's new

• We have added a new liquidity provider session parameter, MDBookType, which selects the market data view requested from the venue: top of book, price depth, or full order book. Where it is not set, market data subscriptions are
  unchanged.

---

What's new

• We have introduced propagation of the trading account and group from the MT4 Bridge and the MT5 Gateway, so orders opened on MT4/MT5 now carry the client's login and group through to the liquidity provider.
• We have added the ability to configure execution volume bands (price-band markup) per client country: the ExecutionPriceBands parameter now accepts a #Country qualifier, applied at execution time with priority account > country > group.

Misc

• We have changed the behaviour of the ThrottleBypass parameter: setting it to 0 now disables the throttle bypass. Previously 0 meant "bypass the throttle on any price change", which effectively disabled throttling instead. To keep the bypass active, set a positive number of points.

---

Misc

• We have improved startup diagnostics: when a configured host name cannot be resolved, the log now reports the DNS failure and the host name instead of a generic "invalid configuration" error.

---

What's new

• We have introduced propagation of the trading account and group from the MT4 Bridge and the MT5 Gateway, so orders opened on MT4/MT5 now carry the client's login and group through to the liquidity provider.
• We have added the ability to configure execution volume bands (price-band markup) per client country: the ExecutionPriceBands parameter now accepts a #Country qualifier, applied at execution time with priority account > country > group.

Misc

• We have changed the behaviour of the ThrottleBypass parameter: setting it to 0 now disables the throttle bypass. Previously 0 meant "bypass the throttle on any price change", which effectively disabled throttling instead. To keep the bypass active, set a positive number of points.

---

What's new

• MT5 symbol import now sets the Maximum Price Filter to the system default (1 000 000) when the MT5 PriceLimitMax is 0, instead of importing 0.
• Liquidity connectors now expose the optional Order Execution Timeout session parameter (milliseconds, 1..3600000), including a new column in the connectors grid.

• The SL/TP cells of open positions and working orders turn orange when they are within 10 pips of the live market price and red when they are within 5 pips.

  

Misc

• The grids on the 'Trade History', 'Order History', 'Cash Transfers' and 'Charts' pages now default to displaying a one-month date range (the same calendar day as today, but one month ago). This was done to speed up the initial loading time for pages with a large amount of data.

---

Bug fixes

• We have corrected the handling of text values that exactly fill their allotted storage — logins, symbol names, comments, group and account names, and MT server names. Such a value could previously lose its final character, or be stored differently, depending on which platform the component was running on. These values are now stored complete and identically everywhere.

---

Bug fixes

• We have fixed an issue where floating leverage rules scheduled across the trading week (for example Sunday 21:10 → Friday 19:59) could fail to apply for the first minutes after their start time, and could apply their end-of-period leverage change at the wrong time. Such rules now activate exactly at their configured start and revert at their configured end.

---

What's new

• We have greatly improved processing performance and reduced memory consumption

---

Bug fixes

• We have resolved the spurious error messages reported by the MT5 External Order Listener plugin when it runs on a History (non-main) server after an upgrade, and hardened plugin startup to prevent a crash seen in certain builds.

---

Misc

• We have introduced Prometheus thread metrics for  MT5Coverage,plugin. Component now collects per-thread latency histograms, memory usage gauges, and a component-level last_update timestamp, exposing them via the heartbeat response to the Configuration API every 5 seconds.

---

Misc

• Saving artifacts to help with crash investigations