Strategies overview

A strategy is a rule set that watches chart data and places signal markers — Buy, Sell, exits — when conditions are met.

If you have only used indicators before, strategies are the new idea: output is discrete trading actions, not just a line.

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Strategies draw signal markers; start from CROSS or EXCEED with defaults.

What you see on the chart

Strategies render as arrows or markers on the main price panel (most keys) or in a dedicated panel (POSITION, DIFFER).

They do not place real orders — your app handles execution. The chart visualizes when a rule would fire.

Standard signal vocabulary

Every strategy input/output uses the same Fusion signal set:

Signal	Typical meaning
Buy	Open / add long
Sell	Open / add short
Exit long	Close long
Exit short	Close short
Exit all	Flatten everything
Do nothing	No action this bar

List inputs (e.g. ONDN, ONUP) let you pick which signal fires for each rule branch.

Strategies vs indicators vs functions

Question	Indicator	Function	Strategy
Output type?	Numeric series	Numeric series	Signals
Example output	RSI 0–100	Shifted EMA	Buy arrow
Good for	Analysis	Custom math	Rules & backtest UX
Default chart	Line / histogram	Line	Markers

flowchart LR
  Price["Price / indicators"]
  Strat["Strategy rules"]
  Markers["Buy / Sell markers"]
  Pos["POSITION panel"]

  Price --> Strat --> Markers
  Strat --> Pos

All 11 built-in strategies

Key	Display name	What it does (plain English)
CROSS	Cross	Signal when series A crosses series B
EXCEED	Exceed	Signal when price/series breaks above/below bands
REBOUND	Rebound	Signal when series returns inside a band range
GREATERLESS	Greater-Less	Signal when A >, <, or = B
CANDLESTICKPATTERNS	Candlestick Patterns	Pattern detected on OHLC → signal
SINGLE	Single Signals	Remove duplicate consecutive signals
JOIN	Join	Combine two strategies (fixed matrix)
DOUBLECHECK	Double Check	Fire only when both strategies agree
MIX	Selective Signals	Combine two strategies (editable matrix)
POSITION	Position Size	Turn signals into position-size line (new panel)
DIFFER	Buy Sell Size	Turn position size into buy/sell deltas (new panel)

Full inputs: Strategy catalog.

Tier 1 — try with defaults

These ship with sensible default series (often MACD or Bollinger + OHLC):

chart.addScript("CROSS");
chart.addScript("EXCEED");
chart.addScript("CANDLESTICKPATTERNS");

CROSS defaults to MACD line vs MACD signal — add MACD first or change series inputs to EMA/SMA in settings.

Tier 2 — composition strategies

Use after you have strategy output series on the chart:

Key	Needs
JOIN, DOUBLECHECK, MIX	Two strategy streams (X, Y)
SINGLE	One strategy stream to dedupe
POSITION	Strategy stream → position histogram
DIFFER	Position-size stream → trade deltas

Example chain:

1. CROSS on EMA vs SMA → signals
2. POSITION on that stream → position panel
3. DIFFER on position → sized buy/sell markers

Programmatic wiring has copy-paste code.

Pick input series (critical)

Strategies are only as good as their series inputs:

• CROSS → LINE (A) and SIGNAL (B)
• EXCEED → upper/lower bands + price series
• GREATERLESS → compare any two lines

In ChartUI, each series input is a dropdown — same system as indicators (Series and panels).

Panel behavior

Keys	Default placement
Main chart markers	CROSS, EXCEED, REBOUND, GREATERLESS, JOIN, MIX, SINGLE, DOUBLECHECK, CANDLESTICKPATTERNS
New panel	POSITION, DIFFER

Override with Panel in settings.

Visibility

Chart settings → On chart → Strategies toggles signal visibility.

API: setChartStrategyVisibility, removeChartStrategy.

Add from ChartUI

1. Toolbar → Indicators → tab Strategy.
2. Pick a strategy → configure series and signal lists.
3. Choose Panel → OK.

What is next?

• Strategy catalog — all 11 keys detailed
• Key strategies — CROSS, EXCEED, POSITION
• Functions overview — build custom series first
• Programmatic wiring