Release notes

Initial release

SahiScript is the scripting language that powers Sahi charts. Every built-in indicator on a Sahi chart is itself a SahiScript program, so whatever they can do, your own scripts can do as well.

A familiar language

SahiScript is compatible with Pine v6 syntax, so scripts written for other charting platforms generally run with little or no modification. The //@version=6 header is accepted but not required.

• User-defined functions, user-defined types and methods, enums and tuples
• if / switch, for, for…in and while loops
• Series and persistent state with var and varip

Built-in functions

• Technical analysis — over 60 ta.* functions, covering moving averages (ema, sma, rma, wma, vwma, hma, alma), oscillators (rsi, macd, stoch, cci, mfi, tsi, wpr), bands and channels (bb, kc, supertrend, dmi), volume (obv, vwap, accdist, pvt), statistics (stdev, correlation, linreg, percentile) and structure (pivothigh, pivotlow, highest, lowest, crossover, barssince, valuewhen)
• Math and strings — the full math.* and str.* libraries
• Collections — arrays, maps and matrices, including typed constructors, sorting, searching and matrix algebra
• Drawing — lines, labels, boxes, tables, linefills and polylines

Inputs

Scripts expose settings through input.int, input.float, input.bool, input.string, input.color, input.source, input.symbol, input.timeframe, input.session, input.price, input.time, input.text_area and input.enum.

input.expiry is unique to Sahi: it allows a script to take a derivatives expiry as a setting, which has no equivalent on other platforms.

Market data

• request.security and request.security_lower_tf for multi-timeframe and multi-symbol analysis
• request.instrument and request.instrument_lower_tf for Sahi instruments
• Options data through request.pcr, request.oi_change_pcr and request.volume_pcr

The editor

Scripts are written in the built-in code editor, which provides autocomplete, hover documentation, signature help, and live error and warning reporting as you type. A script can be applied to the chart without leaving the editor, and the editor itself can be docked beside or below the chart while you work.

Performance

Scripts execute within milliseconds, but scripts using request.security can trigger network calls to fetch market data for the requested symbol and timeframe, so results may take longer to load.

Not supported yet

The first release covers indicators. The following are recognised by the language but are not available to write scripts against yet, and are planned for a future release.

• Strategies — strategy() scripts, order placement and backtest reporting are not supported yet. Scripts in this release are indicators: they calculate and draw, but they do not simulate trades.
• Libraries — scripts cannot yet be published with library() or reused from another script with import. Each script stands on its own for now.
• Alerts — alert() and alertcondition() are accepted so that scripts written elsewhere parse cleanly, but they do not yet trigger notifications.

The complete language reference is still being written. In the meantime, the editor's autocomplete and hover documentation are the most thorough reference available, and the FAQ answers the most common questions.