Scripts overview

Exeria charts run on a Fusion script engine. Everything in this section — RSI, MACD, IF, CROSS — is a script with a stable string key.

You do not install them separately. They ship inside @efixdata/exeria-chart and mount with chart.addScript("KEY").

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Two indicators on one chart — overlay + separate panel.

Indicators — the familiar ones

An indicator reads price (or volume), runs a formula, and draws the result as lines, bands, or histograms.

Examples:

• EMA — moving average on top of candles
• RSI — oscillator in a panel below the chart
• BBAND — upper/middle/lower bands around price

chart.addScript("EMA");
chart.addScript("RSI");

Indicators are what most trading apps mean by “add a study.” Full list: Indicator catalog.

Functions — formulas between series

A function is not a classic indicator. It does not “analyze the market” on its own — it operates on series that already exist:

• raw OHLC from the main symbol
• output lines from indicators you added earlier
• output from other functions or strategies

Function	Plain English
HIGHEST	Rolling highest high over N bars
LOWEST	Rolling lowest low over N bars
DISPLACE	Shift a series forward/back in time
IGLUE	Add, subtract, multiply, or divide two series
IF	If A > B return X, if A = B return Y, else Z
SUM / AVERAGE	Combine up to 10 inputs
FIBONACCI	Fib levels from rolling high/low
1x	Reciprocal 1/x of a series

Why they exist: build custom math without writing C++ or TypeScript. Example pipeline:

1. EMA on close
2. DISPLACE that EMA by 5 bars
3. IF comparing displaced EMA to original EMA

Deep dive: Functions overview.

Strategies — rules that fire signals

A strategy watches one or more series and outputs discrete signals, not just numbers:

Signal	Meaning
Buy	Enter long
Sell	Enter short
Exit long	Close long
Exit short	Close short
Exit all	Flatten
Do nothing	No action

They render as markers/arrows on the chart (main panel by default).

Examples:

• CROSS — signal when series A crosses series B (default: MACD line vs signal)
• EXCEED — price pushes outside a band
• CANDLESTICKPATTERNS — hammer, doji, engulfing, …
• POSITION — turn a signal stream into a position size line in a new panel
• MIX — combine two strategies with a custom truth table

Why they exist: backtesting visuals, alert UX, and chaining logic without a separate rules engine.

Deep dive: Strategies overview.

Series inputs — what gets calculated

Almost every script asks: “Calculate from which data?”

In the settings dialog, series inputs appear as dropdowns like:

• BTCUSDT.Close
• EMA.EMA
• RSI.RSI

Under the hood each value is seriesId:field (for example main:c).

You can point an RSI at:

• main symbol close (default)
• high or low instead
• another indicator’s output line
• a second overlay symbol if multi-instrument mode is on

Full guide: Series and panels.

Panel placement — where it draws

Each script has a default:

• Overlay — draws on the main price panel (newPane: false)
• New panel — opens a row below (newPane: true)

You override this in the settings dialog with the Panel dropdown:

• New panel — dedicated strip (good for RSI, MACD, ATR)
• Main chart — draw on candles (good for EMA, BBAND)
• Existing panel — stack on another study’s pane (e.g. two oscillators sharing one strip)

Details: Series and panels.

Visibility layers in Chart settings

After adding scripts, open Chart settings → On chart (Chart settings):

Tab	Controls
Indicators	Plot / scale label / visible
Functions	Same
Strategies	Visible (signals on/off)
Drawings	User shapes

API: setChartIndicatorVisibility, setChartFunctionVisibility, setChartStrategyVisibility — ChartInstance.

Wiring scripts together

When a function or strategy needs another script’s output, clone the definition and set input values — do not mutate getScripts() templates in place.

const cross = cloneScript(chart.getScripts().CROSS);
cross.inputs.LINE.value = "abc123:EMA";
cross.inputs.SIGNAL.value = "abc123:SMA";
chart.addScript("CROSS", cross);

Walkthrough with live chart: Programmatic wiring.

What is next?

• Series and panels — UI and API for inputs and placement
• Indicators overview
• Functions overview
• Strategies overview
• Authoring conventions — add new keys to the package source