ctx.order.reduce()

Reduce the current position by a percentage.

Signature

ctx.order.reduce(symbol, fraction, metadata?)

Parameters

Example

function onBar(ctx, i) {
  const pos = ctx.position('ASSET');
  
  if (pos.qty > 0) {
    const pnl = (ctx.series.close[i] - pos.avgPrice) / pos.avgPrice;
    
    // Take profit at 5%: close half
    if (pnl > 0.05 && !ctx.state.tookProfit) {
      ctx.order.reduce('ASSET', 0.5, { signal: 'takeProfit', reason: '5pct_gain' });
      ctx.state.tookProfit = true;
    }
    
    // Take profit at 10%: close remaining
    if (pnl > 0.10) {
      ctx.order.close('ASSET', { signal: 'takeProfit', reason: '10pct_gain' });
    }
  }
}

Scaling Out Pattern

function init(ctx) {
  ctx.state.scaleOutLevel = 0;
}

function onBar(ctx, i) {
  const pos = ctx.position('ASSET');
  if (pos.qty === 0) {
    ctx.state.scaleOutLevel = 0;
    return;
  }
  
  const pnl = (ctx.series.close[i] - pos.avgPrice) / pos.avgPrice;
  
  // Scale out at 3%, 6%, 9%
  if (pnl > 0.03 && ctx.state.scaleOutLevel === 0) {
    ctx.order.reduce('ASSET', 0.33, { signal: 'scale_out_1' });
    ctx.state.scaleOutLevel = 1;
  }
  if (pnl > 0.06 && ctx.state.scaleOutLevel === 1) {
    ctx.order.reduce('ASSET', 0.5, { signal: 'scale_out_2' });
    ctx.state.scaleOutLevel = 2;
  }
  if (pnl > 0.09 && ctx.state.scaleOutLevel === 2) {
    ctx.order.close('ASSET', { signal: 'scale_out_final' });
  }
}

Related

• ctx.order.close() — Full exit
• ctx.order.market() — Entry orders