নলেজ লাইব্রেরি

The forum thread asks whether VeighNa version 4.4 can use MiniQMT for live order placement. Replies state that the xttrader interface is not supported for trading in VeighNa and that the vnpy_xt integration provides data access only. They suggest connecting…

This brief forum exchange concerns stop orders in VeighNa 4.3 when running multiple processes or strategies. A user reports that stop orders for exits refresh as expected with one process and one instrument strategy, but stop orders no longer appear after…

A VeighNa community user reports that running a Python file from the command line in Elite Lab fails because the environment cannot find vn.py. The reply explains that the command was launched from the system command prompt rather than Elite Lab’s separate…

This example describes a way to run a VeighNa recorder for Chinese futures data during market sessions. A parent process checks the clock and starts a child process during configured daytime and overnight windows, then terminates it outside those periods.…

The post outlines a way to backtest a continuous sequence of dominant futures contracts in a VeighNa-based system. It argues that an exchange-style continuous index can differ from trading actual contracts because it blends contract prices and may produce…

The article adapts an efficiency ratio to a trend strategy for Chinese government bond futures. The ratio compares the absolute net price change over a lookback window with the sum of absolute price changes in that window. Values nearer one indicate a more…

A VeighNa community exchange addresses a user’s report that some commodity option contracts cannot be found. The reply suggests checking whether the affected module was started only after the main interface logged that contract queries had succeeded. This…

A user asks why a CTP connection to SimNow sometimes connects and sometimes appears unresponsive. The reply points them to SimNow’s published operating hours for each environment as a likely explanation. This suggests that connection availability can vary…

The forum exchange answers where VeighNa Elite stores downloaded market data and how to change that location. A reply points users to the Elite database configuration and says to set its database path to the folder where the database should reside. This…

This event outline presents a learning series on using large language models and AI agents in quantitative research workflows, with examples centered on VeighNa strategy development. Topics include agent and tool interaction, model tool calls, MCP, task…

The document examines how a VeighNa strategy may cancel and replace working orders from its tick callback. It traces the event flow: a tick invokes the strategy, a cancellation request is sent, and the order's status does not become cancelled until the order…

A trader reports that a CTA strategy can receive a short opening fill and a long opening fill almost simultaneously when placing stop orders on opposite sides of a Bollinger band. The strategy tracks net position, so equal and opposite fills bring that value…

This short forum exchange discusses CTP connections that fail or produce no useful log output. One reply explains that the first environment follows live trading hours and points readers to SimNow's documentation. It also says that, outside of penetration…

A user reports that installing the vn.py CTP module on macOS fails while following the community installation guide. The only suggested remedy in the discussion is to try a specific package release, version 6.6.9.1. The thread does not include the error…

This forum exchange explains why VeighNa’s contract query may return no data after a manual Mac installation. The key distinction is that contract lookup depends on a connected trading interface, such as CTP or SimNow, rather than on a market-data package…

This forum exchange explains why a strategy may show several long or short closing trades instead of one apparent exit. The proposed cause is that the strategy submitted multiple sell orders with distinct order IDs and left them active. When later market…

This forum exchange concerns tick-level backtesting of a spread between a cash bond instrument and a futures contract. The questioner has externally downloaded tick data in CSV form because the data source lacks cash-bond ticks, and asks how to import and…

A VeighNa community exchange explains why CTA strategies such as moving-average and ATR-RSI examples may show a flat return curve near the start of a backtest. The initial historical observations are used to initialize the strategy’s ArrayManager, so the…

The post raises an architectural question about combining multiple CTA strategies in a live portfolio. The author has Bollinger-channel and DKX strategies that calculate indicators and position changes, but finds their individual money management conflicts…

A beginner asks why a trading server disconnects during login and whether access is limited to trading hours. They also report that no market data appears when connecting through TTS. The reply explains that connections made outside regular trading hours…

A forum exchange asks whether vn.py version 3.9.1 can still use a TqSdk account to obtain historical data, and what naming convention TqSdk uses for continuous main contracts. The question gives the example of downloading tick history for the main silver…

A VeighNa user reports that configured order and fill limits did not stop a CTA strategy from continuing to place orders when the trader was launched through VeighNa Station. The user had installed and loaded the risk manager, and the strategy submitted…

A VeighNa community exchange explains how to handle overnight positions when using a DA interface. The response recommends scheduling a system restart after the overseas exchange closes, then starting the strategy again without removing and re-adding it. The…

This short forum exchange concerns a VeighNa Trader configuration error. An initial response interprets an invalid integer conversion as a nonnumeric value in a field expected to contain an integer and recommends deleting the settings file so the application…