Building the construction layer of a mechanical trading system

Construction has to lock one procedure

A mechanical trading system is a locked procedure that turns rule inputs, market state, and execution constraints into entry, exit, or abstention signals over the system holding period. Packaged analysis tools are enough when their limits already match the trader. Custom code is justified when a unique indicator or a proprietary mechanical system must be encoded instead of awaited.

System optimization compares alternative rule inputs on that same procedure so test output can be inspected as one repeatable run rather than ad hoc judgment. Walk-forward analysis re-evaluates the same locked procedure on successive unseen segments after each optimization window, so signals are judged as a construction rather than a one-sample fit.

Choosing a compiled construction environment

A commercial user-study environment can create and test custom systems and indicators, but that flexibility makes it complex. A first encoding attempt failed, and a second succeeded after study of a beginner language that the environment closely followed.

A compiled beginner language with built-in graphics and later structured, modular features was chosen as a first language over a more professional alternative because it was easier to learn and sample programs were widely available. The bundled interpreted dialect was described as slow and clumsy, while compiled counterparts were faster and more capable.

A compiled construction environment is a language and editor setup used to write, trace, and run the file-access and signal modules that later optimization will call. One compiler environment used movable windows for editing, messages, tracing, and watching execution so changes could be tested immediately. The other supplied more features plus in-editor command help with examples that could be copied, modified, and run, and was chosen for those teaching and debugging aids.

The first module reads a master catalog

The first construction module reads a vendor master catalog that an ordinary directory listing cannot decode. A master catalog is a companion index that maps opaque data filenames to security identity, date span, ticker, and field layout so a mechanical system can select a series.

That module maps opaque numbered data files to security names, ticker symbols, start and end dates, and field counts. In that master catalog, a field count of 5 identified a stock or index and a field count of 7 identified a commodity.

Study method and later modules

A casual two-book self-study method was presented as how a novice wrote a full technical analysis system in less than three months. The first pass is for concepts without forcing every detail. A second book at the same level then lets earlier gaps resolve.

Later construction steps were planned as display screens, in-memory file handling, bar charts, indicators, study arrays, pop-up help, auto-optimization of complete mechanical systems, printed test results, and a follow-on module that loads a selected price series into memory for charting and analysis.