Platform Services

Three services expose script execution to clients:

Service	Transport	Purpose
Validator	HTTP or WebSocket RPC	Compile and validate scripts on a synthetic candle snapshot
Backtesting	HTTP or WebSocket RPC	Run strategies and indicators over historical candles
IndiChart	dxLink WebSocket channel	Stream live candles and indicator outputs to chart clients

How they fit together

                    ┌─────────────────┐
                    │  dxScript code  │
                    └────────┬────────┘
                             │
         ┌───────────────────┼───────────────────┐
         ▼                   ▼                   ▼
  ┌──────────────┐   ┌──────────────┐   ┌──────────────┐
  │  Validator   │   │ Backtesting  │   │  IndiChart   │
  │  (metadata)  │   │  (history)   │   │  (realtime)  │
  └──────────────┘   └──────────────┘   └──────────────┘

Use the validator when you need to check that a script compiles, discover its declared inputs and outputs, or obtain first-bar calculation samples without loading market data.

Use backtesting when you need a full historical run: candles for a date range, per-bar indicator outputs, and strategy trade reports with performance analytics.

Use IndiChart when you need a live chart feed: candle snapshots and updates aligned with indicator calculation results over a dxLink WebSocket session.

Choosing a service

Aspect	Validator	Backtesting	IndiChart
Market data	Synthetic snapshot	Historical candles	Live feed subscription
Calculation window	First bar samples only	Full loaded window	Streaming per subscription
Strategy reports	Performance summary only	Yes	No
Transport	HTTP / WebSocket RPC	HTTP / WebSocket RPC	WebSocket channel
Best for	Compile checks, input discovery	Historical strategy evaluation	Live charts and realtime preview

Pick one service per task — they are complementary, not interchangeable. Validate before publishing, backtest when you need history and trade analytics, and subscribe through IndiChart when the UI needs a live stream.

Language support

All services accept dxScript source with lang set to dxscript-js.

Strategy scripts (strategy() in the init section) are always supported by backtesting. The validator accepts them unless strategy support is disabled on the deployment. IndiChart compiles indicator scripts only.

Related documentation

• API Reference — endpoints, request shapes, and response fields
• Language Reference — dxScript language API
• Strategy — trading simulation API
• Indicator — indicator declaration API