Leetcode - 121. Best Time to Buy and Sell Stock

/**
 * @param {number[]} prices
 * @return {number}
 */
var maxProfit = function(prices) {

    let p1 = 0;
    let p2 = 1;


    let maxProfit =  0  ;

    while(p2<prices.length){
        if(prices[p2]<prices[p1]){
            p1 = p2;
        }else{
        maxProfit = Math.max(maxProfit, prices[p2]-prices[p1]);
        }
        p2++
    }

    return maxProfit
};