/**
* Pivot Points Standard Indicator
* Support and resistance levels calculated from previous period OHLC data
*/
export function calculatePivotPoints(high, low, close) {
// Input validation
if (!isFinite(high) || !isFinite(low) || !isFinite(close)) {
return {
pivotPoint: null,
resistance1: null,
resistance2: null,
resistance3: null,
support1: null,
support2: null,
support3: null,
currentPosition: null,
};
}
if (high < low) {
throw new Error('High price must be greater than or equal to low price');
}
if (close < low || close > high) {
throw new Error('Close price must be between low and high prices');
}
// Pivot Point = (High + Low + Close) / 3
const pivotPoint = (high + low + close) / 3;
// Resistances
const resistance1 = (2 * pivotPoint) - low;
const resistance2 = pivotPoint + (high - low);
const resistance3 = pivotPoint + 2 * (high - low);
// Supports
const support1 = (2 * pivotPoint) - high;
const support2 = pivotPoint - (high - low);
const support3 = pivotPoint - 2 * (high - low);
return {
pivotPoint,
resistance1,
resistance2,
resistance3,
support1,
support2,
support3,
currentPosition: null, // Will be set by caller with current price
};
}
export function getPricePositionRelativeToPivot(currentPrice, pivotData) {
const { pivotPoint, resistance1, resistance2, resistance3, support1, support2, support3 } = pivotData;
if (!pivotPoint || !resistance1 || !resistance2 || !resistance3 || !support1 || !support2 || !support3) {
return 'between_pp_s1'; // Default neutral position
}
if (currentPrice >= resistance3)
return 'above_r3';
if (currentPrice >= resistance2)
return 'between_r2_r3';
if (currentPrice >= resistance1)
return 'between_r1_r2';
if (currentPrice >= pivotPoint)
return 'between_pp_r1';
if (currentPrice >= support1)
return 'between_pp_s1';
if (currentPrice >= support2)
return 'between_s1_s2';
if (currentPrice >= support3)
return 'between_s2_s3';
return 'below_s3';
}
