fixing compile issues

src/ABANDS/AccelerationBands.ts

@@ -1,13 +1,12 @@
-import {Big} from '../index.js';
+import {Big, TechnicalIndicator} from '../index.js';
 import {FasterSMA, SMA} from '../SMA/SMA.js';
 import {NotEnoughDataError} from '../error/index.js';
 import type {BandsResult, FasterBandsResult} from '../util/BandsResult.js';
-import type {Indicator} from '../Indicator.js';
 import type {FasterMovingAverageTypes, MovingAverageTypes} from '../MA/MovingAverageTypes.js';
 import type {FasterMovingAverage, MovingAverage} from '../MA/MovingAverage.js';
 import type {HighLowClose, HighLowCloseNumber} from '../util/index.js';
 
-export class AccelerationBands implements Indicator<BandsResult, HighLowClose> {
+export class AccelerationBands extends TechnicalIndicator<BandsResult, HighLowClose> {
   private readonly lowerBand: MovingAverage;
   private readonly middleBand: MovingAverage;
   private readonly upperBand: MovingAverage;
@@ -37,6 +36,7 @@ export class AccelerationBands implements Indicator<BandsResult, HighLowClose> {
     public readonly width: number,
     SmoothingIndicator: MovingAverageTypes = SMA
   ) {
+    super();
     this.lowerBand = new SmoothingIndicator(interval);
     this.middleBand = new SmoothingIndicator(interval);
     this.upperBand = new SmoothingIndicator(interval);
@@ -75,7 +75,7 @@ export class AccelerationBands implements Indicator<BandsResult, HighLowClose> {
   }
 }
 
-export class FasterAccelerationBands implements Indicator<FasterBandsResult, HighLowCloseNumber> {
+export class FasterAccelerationBands extends TechnicalIndicator<FasterBandsResult, HighLowCloseNumber> {
   private readonly lowerBand: FasterMovingAverage;
   private readonly middleBand: FasterMovingAverage;
   private readonly upperBand: FasterMovingAverage;
@@ -85,6 +85,7 @@ export class FasterAccelerationBands implements Indicator<FasterBandsResult, Hig
     public readonly width: number,
     SmoothingIndicator: FasterMovingAverageTypes = FasterSMA
   ) {
+    super();
     this.lowerBand = new SmoothingIndicator(interval);
     this.middleBand = new SmoothingIndicator(interval);
     this.upperBand = new SmoothingIndicator(interval);

src/BBANDS/BollingerBands.ts

@@ -1,8 +1,7 @@
-import {Big, type BigSource} from '../index.js';
+import {Big, TechnicalIndicator, type BigSource} from '../index.js';
 import {SMA} from '../SMA/SMA.js';
 import {NotEnoughDataError} from '../error/index.js';
 import type {BandsResult, FasterBandsResult} from '../util/BandsResult.js';
-import type {Indicator} from '../Indicator.js';
 import {getFasterAverage, getFasterStandardDeviation, getStandardDeviation} from '../util/index.js';
 
 /**
@@ -20,7 +19,7 @@ import {getFasterAverage, getFasterStandardDeviation, getStandardDeviation} from
  *
  * @see https://www.investopedia.com/terms/b/bollingerbands.asp
  */
-export class BollingerBands implements Indicator<BandsResult> {
+export class BollingerBands extends TechnicalIndicator<BandsResult, BigSource> {
   public readonly prices: Big[] = [];
   private result: BandsResult | undefined;
 
@@ -32,7 +31,9 @@ export class BollingerBands implements Indicator<BandsResult> {
   constructor(
     public readonly interval: number,
     public readonly deviationMultiplier: number = 2
-  ) {}
+  ) {
+    super();
+  }
 
   get isStable(): boolean {
     return this.result !== undefined;
@@ -69,14 +70,16 @@ export class BollingerBands implements Indicator<BandsResult> {
   }
 }
 
-export class FasterBollingerBands implements Indicator<FasterBandsResult> {
+export class FasterBollingerBands extends TechnicalIndicator<FasterBandsResult, BigSource> {
   public readonly prices: number[] = [];
   private result: FasterBandsResult | undefined;
 
   constructor(
     public readonly interval: number,
     public readonly deviationMultiplier: number = 2
-  ) {}
+  ) {
+    super();
+  }
 
   updates(prices: number[]) {
     prices.forEach(price => this.update(price));

src/DMA/DMA.ts

@@ -1,6 +1,5 @@
 import type {Big, BigSource} from '../index.js';
 import {TechnicalIndicator} from '../index.js';
-import type {Indicator} from '../Indicator.js';
 import type {FasterMovingAverage, MovingAverage} from '../MA/MovingAverage.js';
 import type {FasterMovingAverageTypes, MovingAverageTypes} from '../MA/MovingAverageTypes.js';
 import {FasterSMA, SMA} from '../SMA/SMA.js';
@@ -55,11 +54,12 @@ export class DMA extends TechnicalIndicator<DMAResult, BigSource> {
   }
 }
 
-export class FasterDMA implements Indicator<FasterDMAResult, number> {
+export class FasterDMA extends TechnicalIndicator<FasterDMAResult, number> {
   public readonly short: FasterMovingAverage;
   public readonly long: FasterMovingAverage;
 
   constructor(short: number, long: number, SmoothingIndicator: FasterMovingAverageTypes = FasterSMA) {
+    super();
     this.short = new SmoothingIndicator(short);
     this.long = new SmoothingIndicator(long);
   }

src/STOCH/StochasticOscillator.ts

@@ -1,5 +1,4 @@
-import type {Indicator} from '../Indicator.js';
-import {Big} from '../index.js';
+import {Big, TechnicalIndicator} from '../index.js';
 import {FasterSMA, SMA} from '../SMA/SMA.js';
 import {getMaximum} from '../util/getMaximum.js';
 import {getMinimum} from '../util/getMinimum.js';
@@ -37,7 +36,7 @@ export interface FasterStochasticResult {
  * @see https://en.wikipedia.org/wiki/Stochastic_oscillator
  * @see https://www.investopedia.com/terms/s/stochasticoscillator.asp
  */
-export class StochasticOscillator implements Indicator<StochasticResult, HighLowClose> {
+export class StochasticOscillator extends TechnicalIndicator<StochasticResult, HighLowClose> {
   private readonly periodM: SMA;
   private readonly periodP: SMA;
 
@@ -56,6 +55,7 @@ export class StochasticOscillator implements Indicator<StochasticResult, HighLow
     public readonly m: number,
     public readonly p: number
   ) {
+    super();
     this.periodM = new SMA(m);
     this.periodP = new SMA(p);
   }
@@ -103,7 +103,7 @@ export class StochasticOscillator implements Indicator<StochasticResult, HighLow
   }
 }
 
-export class FasterStochasticOscillator implements Indicator<FasterStochasticResult, HighLowCloseNumber> {
+export class FasterStochasticOscillator extends TechnicalIndicator<FasterStochasticResult, HighLowCloseNumber> {
   public readonly candles: HighLowCloseNumber[] = [];
   private result: FasterStochasticResult | undefined;
   private readonly periodM: FasterSMA;
@@ -119,6 +119,7 @@ export class FasterStochasticOscillator implements Indicator<FasterStochasticRes
     public m: number,
     public p: number
   ) {
+    super();
     this.periodM = new FasterSMA(m);
     this.periodP = new FasterSMA(p);
   }

src/index.ts

@@ -1,4 +1,7 @@
 export {default as Big, type BigSource} from 'big.js';
+export * from './Indicator.js';
+export * from './MA/MovingAverage.js';
+export * from './MA/MovingAverageTypes.js';
 export * from './ABANDS/AccelerationBands.js';
 export * from './AC/AC.js';
 export * from './ADX/ADX.js';
@@ -13,9 +16,6 @@ export * from './DMA/DMA.js';
 export * from './DX/DX.js';
 export * from './EMA/EMA.js';
 export * from './error/index.js';
-export * from './Indicator.js';
-export * from './MA/MovingAverage.js';
-export * from './MA/MovingAverageTypes.js';
 export * from './MACD/MACD.js';
 export * from './MAD/MAD.js';
 export * from './MOM/MOM.js';

src/util/Period.test.ts

@@ -78,11 +78,11 @@ describe('Period', () => {
         if (period.isStable) {
           const expected = lowest.shift();
           expect(period.lowest?.toFixed(2)).toBe(expected);
-          expect(fasterPeriod._lowest?.toFixed(2)).toBe(expected);
+          expect(fasterPeriod.lowest?.toFixed(2)).toBe(expected);
         }
       }
       expect(period.highest?.toFixed(2)).toBe('87.77');
-      expect(fasterPeriod._highest?.toFixed(2)).toBe('87.77');
+      expect(fasterPeriod.highest?.toFixed(2)).toBe('87.77');
     });
   });
 });

vitest.config.ts

@@ -1,6 +1,9 @@
 import {defineConfig} from 'vitest/config';
 
 export default defineConfig({
+  esbuild: {
+    target: 'es2022',
+  },
   test: {
     bail: 1,
     coverage: {