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EMA Crossover Project

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WFA

// EMA Crossover Strategy

function define(ctx) {

ctx.param('fastLength', { type: 'int', default: 9 });

ctx.param('slowLength', { type: 'int', default: 21 });

}

function onBar(ctx, i) {

if (q.crossOver(ctx.fastEMA, ctx.slowEMA, i))

ctx.order.market('long');

}

ConfigJobs

SymbolBTCUSDT

Interval4h

ModeLong Only

Capital10,000

0 errors0 warnings

QSL v1.0

The Research Lab is the main workspace. It combines a code editor, backtest runner, optimizer, and analysis tools into a single interface.

Code Editor

The left panel contains a full-featured code editor for your QSL strategy:

Syntax highlighting for JavaScript/QSL
Parameter extraction from your define() function
Inline error reporting when strategies fail validation

Changes to the code are reflected immediately — save your strategy, and the parameter panel updates to match.

Running a Backtest

From the Backtest tab in the right dock:

Select a symbol (e.g., BTCUSDT) and interval (e.g., 4h)
Set the date range or candle range
Configure portfolio amount and trading fees
Click Run Backtest

Results appear in the same panel: equity curve, trade list, and performance metrics.

Switching Contexts

The right dock tabs let you move through the research pipeline without leaving the page:

Write code in Definition
Test it in Backtest
Search for robust parameters in Optimization
Validate with WFA
Analyze stability in Robustness

Your strategy code stays mounted across all tabs. Switching between them does not reset your work.

Keyboard Shortcuts

Shortcut	Action
`Ctrl+S`	Save strategy
`Ctrl+Enter`	Run backtest

Next Steps

Running a Backtest — Detailed backtest guide
Running Optimization — Parameter search guide
Projects — Managing strategy projects