Standard Library

Math, array manipulation, string utilities, logging, type conversion, and indicator orchestration — all built into the language with no imports required.

Math.*

Function / Property	Parameters	Returns	Description
`Math.Abs(x)`	`double x`	`double`	Absolute value.
`Math.Sqrt(x)`	`double x`	`double`	Square root.
`Math.Pow(base,exp)`	`double base, exp`	`double`	base raised to the power of exp.
`Math.Log(x)`	`double x`	`double`	Natural logarithm.
`Math.Exp(x)`	`double x`	`double`	e raised to the power x.
`Math.Sin(x)`	`double x`	`double`	Sine (radians).
`Math.Cos(x)`	`double x`	`double`	Cosine (radians).
`Math.Floor(x)`	`double x`	`double`	Largest integer ≤ x.
`Math.Ceil(x)`	`double x`	`double`	Smallest integer ≥ x.
`Math.Round(x)`	`double x`	`double`	Round to nearest integer.
`Math.Min(a,b)`	`double a, b`	`double`	Minimum of two values.
`Math.Max(a,b)`	`double a, b`	`double`	Maximum of two values.
`Math.Clamp(x,lo,hi)`	`double x, lo, hi`	`double`	Constrain x to [lo, hi].

Array Functions

Function / Property	Parameters	Returns	Description
`create_array(size)`	`int size`	`double[]`	Create a zero-filled array.
`length(arr)`	`double[] arr`	`int`	Number of elements.
`Array.Sum(arr)`	`double[] arr`	`double`	Sum of all elements.
`Array.Avg(arr)`	`double[] arr`	`double`	Average of all elements.
`Array.Min(arr)`	`double[] arr`	`double`	Minimum element.
`Array.Max(arr)`	`double[] arr`	`double`	Maximum element.
`Highest(arr,n)`	`double[] arr, int n`	`double`	Maximum over last n bars.
`Lowest(arr,n)`	`double[] arr, int n`	`double`	Minimum over last n bars.
`fill(arr,val)`	`double[] arr, double`	`void`	Fill entire array with a constant.
`slice(arr,s,e)`	`double[] arr, int s,e`	`double[]`	Extract sub-array from index s to e.
`reverse(arr)`	`double[] arr`	`double[]`	Reversed copy.
`sort(arr)`	`double[] arr`	`double[]`	Sorted ascending copy.

String Functions

Function / Property	Parameters	Returns	Description
`String.Length(text)`	`string text`	`int`	Number of characters.
`String.Contains(text,sub)`	`string text, sub`	`bool`	True if text contains sub.
`String.Upper(text)`	`string text`	`string`	Uppercase copy.
`String.Lower(text)`	`string text`	`string`	Lowercase copy.
`String.Substring(text,s,n)`	`string text, int s, n`	`string`	Extract n chars starting at s.

Logging & Alerts

Function / Property	Parameters	Returns	Description
`Print(msg)`	`string msg`	`void`	Write to the strategy journal.
`Log.Info(msg)`	`string msg`	`void`	Info-level log entry.
`Log.Warn(msg)`	`string msg`	`void`	Warning-level log entry.
`Log.Error(msg)`	`string msg`	`void`	Error-level log entry.
`Alert(msg)`	`string msg`	`void`	Pop-up alert (live mode only).
`Notify(msg)`	`string msg`	`void`	Push notification to mobile app (live only).

Logging exampleTDSL

Init() { Print("Strategy started on " + Symbol()); }

Tick() {
  double dd = (Account.Balance() - Account.Equity()) / Account.Balance() * 100.0;
  if (dd > 5.0) { Log.Warn("Drawdown: " + ToString(dd) + "%"); }
  if (Env.IsLive() && dd > 10.0) { Notify("Drawdown alert: " + ToString(dd) + "%"); }
}

Type Conversions

Function / Property	Parameters	Returns	Description
`ToString(val)`	`any val`	`string`	Convert int, double, bool, or datetime to string.
`ToDouble(text)`	`string text`	`double`	Parse a string to double.
`ToInteger(text)`	`string text`	`int`	Parse a string to int.
`ToTime(text)`	`string text`	`datetime`	Parse an ISO-format datetime string.

Orchestration Functions

These wire up sub-indicators inside Init(). Available only at the top level of a Strategy or Indicator script.

Function / Property	Parameters	Returns	Description
`Load(proxyName)`	`identifier`	`void`	Activate a sub-indicator proxy defined by a .calculate() block.
`Native.Source(i.Name)`	`indicator alias`	`void`	Select a native indicator engine.
`Native.Init(sym, tf)`	`string sym, tf`	`void`	Set symbol and timeframe context for the native engine.
`Native.Parameter(…)`	`variadic`	`void`	Pass positional parameters to the native engine.
`Native.Bind(proxyName)`	`identifier`	`void`	Bind the configured native engine to a proxy name.
`Native.Fetch(index, buf)`	`int idx, double[]`	`void`	Copy native output buffer at index into buf.
`Custom.Source("file")`	`string path`	`void`	Load an external .tbc script as a source.
`Custom.Init(sym, tf)`	`string sym, tf`	`void`	Set context for the external script.
`Custom.Bind(proxyName)`	`identifier`	`void`	Bind external script output to a proxy name.
`Custom.Fetch(index, buf)`	`int idx, double[]`	`void`	Copy external script output buffer into buf.
`Chart.resume_index`	`—`	`int`	Index of first bar needing recalculation. 0 on first run.

PreviousNative Indicators