app.js

/**
 * Buy Low, Sell High -- Starter Code
 **/

// Stock Prices
iagStockPrices = [1.32, 1.14, 1.45, 1.20, 1.34, 1.74, 1.18, 1.90, 1.1];


// Your Biggest Profit function
var biggestProfit = function (stockArray, sharesBought) {
    var min = stockArray[0];
    var max = stockArray[1] - stockArray[0];
    var maxprice = stockArray[1]
    for (var i = 1; i < stockArray.length; i++) {
        var current = stockArray[i];

        var potential = current - min;

        if (max < potential) {
            max = potential;
            maxprice = current;
        }
        if (min > current) {
            if (i < stockArray.length-1) {
                min = current;
            }
        }

    }

    document.write("Profit: $" + (max * 10000));
    document.write("Buy price: " + min);
    document.write("Sell price: " + maxprice);
};

// A Call to your Biggest Profit function.
biggestProfit(iagStockPrices, 10000);

// NOTE: This should return 7600, 
// because you could have bought it at 1.14 per share 
// and then sold it at 1.90 per share. 
// 1.90 - 1.14 = 0.76. 0.76 * 10000 is 7600.