import { TrendIndicator } from '../../base/Indicator.js';
import type { HighLowClose } from '../../base/Candle.type.js';
export type KeltnerChannelsResult = {
    lower: number;
    middle: number;
    upper: number;
};
export type KeltnerChannelsConfig = {
    atrInterval?: number;
    emaInterval?: number;
    multiplier?: number;
};
export declare class KeltnerChannels extends TrendIndicator<KeltnerChannelsResult, HighLowClose<number>> {
    #private;
    readonly inputShape: "high-low-close";
    readonly atrInterval: number;
    readonly emaInterval: number;
    readonly multiplier: number;
    constructor({ atrInterval, emaInterval, multiplier }?: KeltnerChannelsConfig);
    getRequiredInputs(): number;
    update(candle: HighLowClose<number>, replace: boolean): KeltnerChannelsResult | null;
    protected calculateSignalState(result?: {
        lower: number;
        upper: number;
    } | null): "BEARISH" | "BULLISH" | "SIDEWAYS" | "UNKNOWN";
}