,

@genevieve_boehm

To compute the Relative Strength Index (RSI) using Scala, you can follow these steps:

- Define the period for which you want to calculate RSI (usually 14 days is used).
- Create a list of historical closing prices for the given period.
- Calculate the daily price changes by subtracting the current day's closing price from the previous day's closing price.
- Separate the positive and negative daily price changes into their respective lists.
- Calculate the average gain (AG) and average loss (AL) over the defined period.
- Calculate the Relative Strength (RS) by dividing the AG by AL.
**Calculate the RSI using the formula**: RSI = 100 - (100 / (1 + RS)).

Here is an example of how you can implement this in Scala:

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def calculateRSI(prices: List[Double], period: Int): Double = { val priceChanges = prices.sliding(2).map{ case List(a, b) => b - a }.toList val (positiveChanges, negativeChanges) = priceChanges.partition(_ > 0) val averageGain = positiveChanges.take(period).sum / period val averageLoss = negativeChanges.take(period).map(Math.abs).sum / period val RS = if (averageLoss != 0) averageGain / averageLoss else 0 val RSI = 100 - (100 / (1 + RS)) RSI } // Example usage val prices = List(10.2, 12.5, 11.8, 14.6, 16.3, 15.7, 17.2, 19.8, 21.5, 22.3, 20.9, 19.5, 18.7, 23.2) val period = 14 val rsi = calculateRSI(prices, period) println(s"The RSI for the given prices is: $rsi") |

This code snippet demonstrates how to calculate RSI for a list of historical prices over a specified period using Scala.

15

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