BIAS

Bias ratio indicator - measures deviation from moving average.

Usage

const data = await sdk.getKlineWithIndicators('sz000858', {
  indicators: { bias: { periods: [6, 12, 24] } }
});

data.forEach(k => {
  console.log(`BIAS6: ${k.bias?.bias6}, BIAS12: ${k.bias?.bias12}`);
});

Manual Calculation

import { calcBIAS } from 'stock-sdk';

const closes = [/* close prices */];
const bias6 = calcBIAS(closes, 6);
const bias12 = calcBIAS(closes, 12);

Formula

$$BIAS = \frac{Close - MA_n}{MA_n} \times 100$$

Interpretation

• Positive BIAS: Price is above MA, potentially overbought
• Negative BIAS: Price is below MA, potentially oversold
• High absolute value: Price may revert to mean