Technical Audit: PSAR Trend Filter¶
1. Architectural Efficiency & Optimization¶
The script demonstrates a high degree of computational efficiency. Its architecture is lean and optimized for performance, even on lower timeframes.
Use of Built-in Functions: The core logic relies entirely on highly optimized built-in functions:
ta.sar,ta.ema, andta.dmi. The author has correctly avoided manual calculations for these common indicators, which is a critical best practice for preventing performance bottlenecks.Efficient Boolean Logic: The implementation of the optional filters is exemplary. The pattern
filter_is_ok = not useFilter or (condition)is used throughout. This leverages boolean short-circuiting: if the filter is disabled (useFilteris false), the engine doesn’t waste cycles evaluating the more complex(condition). This is a subtle but powerful optimization technique.State Management: The cooldown mechanism is implemented correctly using a
var intvariable (lastSignalBar). This ensures the variable persists its state across historical and real-time bars without being reset, which is the only correct way to track events over time.Redundancy: There are no redundant calculations. Each variable is computed once per bar, and the logical flow is direct and purposeful. The script does not suffer from recalculation loops or inefficient data handling.
max_bars_backis not explicitly set, but Pine Script’s automatic detection is sufficient here, as the lookback periods are determined by theemaLengthandadxLengthinputs, which are well within standard limits.
Conclusion: The script is architecturally sound and computationally lightweight. It will not cause chart lag.
2. Modern Standards & Syntax Audit¶
The script is written in //@version=6, which is beyond the v5 standard and represents the most current version of Pine Script. This immediately places it at the forefront of modern development practices.
Legacy Check: Not applicable. The script is fully native to the latest Pine Script version and contains no legacy syntax.
Modern Syntax Usage:
input.group: The inputs are perfectly organized usinginput.group, dramatically improving the user experience and readability of the script’s settings panel.const string: The use ofconst stringfor group names is a professional touch that prevents typos and centralizes key strings, enhancing maintainability.ta.dmiDestructuring: The line[_, _, adxValue] = ta.dmi(...)is the correct, modern way to extract only the ADX value while ignoring the unneeded DI+ and DI- values. This demonstrates a clear understanding of function return types.Color Handling:
color.rgb()andcolor.new()are used for all color definitions, which is the current best practice.
Advanced Features: The script’s logic is straightforward and does not inherently require complex data structures like Arrays, Maps, or User-Defined Types (UDTs). While these features are powerful, their absence here is not a deficiency; rather, it reflects a design that is appropriately simple for the task. Forcing a UDT to hold signal state, for example, would likely add unnecessary complexity without a clear benefit.
Conclusion: The script is a model example of modern Pine Script v6 syntax and features.
3. Logic Integrity & Reliability¶
The script’s logic is robust, reliable, and free from common trading script fallacies.
Repainting & Future Leaks: The script is 100% non-repainting.
It does not use
request.security()in a way that could cause repainting.The
confirmOnCloseinput is handled flawlessly withbarstate.isconfirmed. This gives users explicit control over whether signals are generated intra-bar (and can thus move) or only on the confirmed close of a bar, which is the gold standard for preventing false signals on live data.
Calculation Stability:
naHandling: The script shows excellent attention to detail by explicitly checking fornavalues from the ADX calculation (not na(adxValue)). This prevents the ADX filter from producing erroneous results during the indicator’s initialization period at the beginning of the chart’s history.Division-by-Zero: There is no risk of division-by-zero errors, as all complex mathematics are encapsulated within the safe, built-in
ta.*functions.
Cooldown Logic: The cooldown logic using
bar_index - lastSignalBar > cooldownBarsis correctly implemented and reliable for preventing a rapid succession of signals.
Conclusion: The script’s logic is sound, stable, and trustworthy. It produces reliable, non-repainting signals.
4. Readability & Maintainability¶
The code quality is exceptionally high, making it easy to read, understand, and maintain.
Naming Conventions: Variable and function names (
rawBuySignal,trendLongOk,useCooldown,cooldownBars) are descriptive, clear, and follow a consistent convention. The code is largely self-documenting.Code Structure: The use of block comments (
//--- CORE CALCULATION ---) to segment the script into logical sections (Inputs, Calculation, Filters, Plots) makes the code extremely easy to navigate.Documentation: While the code is very clear, the presence of a few comments in Russian (
// Правильное получение ADX) is the only minor friction point for a non-Russian-speaking developer. However, the code’s clarity makes these comments non-essential for understanding the logic.Input Organization: As mentioned, the
input.groupusage is best-in-class and a major contributor to the script’s overall quality and user-friendliness.
Conclusion: The script is a prime example of “Clean Code” principles applied to Pine Script.
Audit Verdict¶
Code Quality Grade: A
This script is of outstanding quality and serves as an excellent benchmark for modern Pine Script development. It is efficient, robust, and highly readable.
Greatest Technical Achievement: The script’s greatest achievement is its flawless and user-centric implementation of signal filtering. The combination of the efficient
not useFilter or (condition)pattern with the rock-solid, non-repaintingbarstate.isconfirmedlogic provides a powerful, reliable, and high-performance filtering engine that is both developer-friendly and easy for the end-user to configure.Most Significant Technical Debt: The script has virtually no technical debt. The only identifiable, albeit minor, point of friction is the presence of Russian-language comments. While not a logical or performance flaw, this creates a small barrier to maintainability for a global or non-Russian-speaking development team. In a professional context, standardizing comments to English is preferable for broader collaboration.