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layout default
title Context Class
parent Runtime
nav_order 1
permalink /architecture/runtime/context/

The Context Class (Context.class.ts)

The Context is the central object (usually named $) passed to the transpiled function. It acts as the container for:

  1. Market Data: $.data.open, $.data.close, etc.
  2. User Variables: $.let, $.const, $.var.
  3. Function State: $.taState, $.params.
  4. Namespaces: $.ta, $.math, $.request, $.pine.

Initialization (init)

The init method is used for every variable assignment.

init(target, source, index = 0)
  • If target exists, it updates the current value.
  • If target is null, it creates a new Series.
  • It handles converting raw values or arrays into Series.

Accessors (get / set)

PineTS uses specific accessors to handle Pine Script indexing semantics.

  • get(series, index): Returns series[length - 1 - index]. Index 0 is the most recent item.
  • set(series, value): Updates series[length - 1].

Precision

All numeric outputs are routed through context.precision() to enforce consistent decimal rounding (default 10 places), matching Pine Script behavior.