Ho scritto questo listato in JavaScript ES5 e preferirei non utilizzare le funzionalità moderne di ES6. Vorrei un’analisi di questo listato in lingua italiana, con particolare attenzione ai seguenti punti  e lasciando stare considerazioni su var sideUpper, toUpperCase sideLower e sideUpper che gia’ conosco 
:
1.	Ridondanza di codice o controlli logici: Identificare eventuali ripetizioni inutili o controlli logici superflui.
2.	Ottimizzazioni: Suggerire miglioramenti per rendere il codice più efficiente.
3.	Compattazioni: Proporre modi per rendere il codice più conciso.
4.	Ricerca di maggiore efficienza e velocità di esecuzione: Consigli su come migliorare le prestazioni del codice.    var CONST = {
    ORDER_SIDE: 'BID',
    SIZE: 1,
    MAX_OPERATIONS: 8,
    STAY_AT_LEVEL_BID: 6,
    STAY_AT_LEVEL_ASK: 6,
    SECONDS: 5,
    MONITORING_MODE: 'MONITORA_yourlevel' // Può essere 'MONITORA_1level' o 'MONITORA_yourlevel'
};

var separator = "---------------------------------------------------\r\n";

var lookup = {
    BID: { side: 'Bid', level: CONST.STAY_AT_LEVEL_BID },
    ASK: { side: 'Ask', level: CONST.STAY_AT_LEVEL_ASK }
};

var actionMessages = {
    "Initialization Complete": function (data) {
        return "Inizializzazione completata: \nBid Price 0: " + UserContext.prices.bid.current + "\nAsk Price 0: " + UserContext.prices.ask.current + "\n";
    },
    "Order Action": function (data) {
        return 'Ordine ' + data.action + ': ' + data.order.OrderCode + "\n";
    },
    "Price Variation": function (data) {
        return 'Livello da ' + data.lastLevel + " all'attuale livello " + data.priceLevel + "\n";
    }
};

var BookUtils = {
    getData: function (book, side, type, level) {
        var sideData = (side === 'Bid') ? book.Bid : book.Ask;
        return type === 'Price' ? sideData.Price(level) : sideData.Quantity(level);
    },
    
    getBookState: function (book) {
    return {
        bidPrice: book.Bid.Price(0),
        bidQuantity: book.Bid.Quantity(0),
        askPrice: book.Ask.Price(0),
        askQuantity: book.Ask.Quantity(0)
    };
  }
};

var OrderUtils = {
    execOrder: function (side, stock, price, size) {
        return side === 'BID' ? OrderManager.Buy(stock, price, size) : OrderManager.Sell(stock, price, size);
    },

    updateOrderContext: function (order, side, price) {
        UserContext.order.current = order;
        UserContext.prices[side.toLowerCase()].oldLevel = price;
        return order;
    },

    processOrModOrder: function (side, stock, price) {
        var currentOrder = UserContext.order.current;
        if (currentOrder) {
            if (currentOrder.Price === price) {
                return currentOrder;
            }
            var modifiedOrder = OrderManager.Modify(currentOrder.OrderCode, price);
            return this.updateOrderContext(modifiedOrder, side, price);
        }
        var newOrder = this.execOrder(side, stock, price, CONST.SIZE);
        return this.updateOrderContext(newOrder, side, price);
    },

    deleteOrder: function (orderCode) {
        return OrderManager.Delete(orderCode);
    }
};

var Helper = {
    PriceDirection: function (targetPrice, oldPrice) {
        return targetPrice > oldPrice ? 1 : (targetPrice < oldPrice ? -1 : 0);
    },

    formatState: function (bookState) {
        return separator + 
          "Bid Price \tBid Quant.   \tAsk Price \tAsk Quant. \r\n" + separator +
          bookState.bidPrice + "\t\t" + bookState.bidQuantity + "\t\t" + bookState.askPrice + "\t\t" + bookState.askQuantity + "\r\n" +
          separator + "Numero Operazione: " + UserContext.status.numOperazione + "\r\n" + separator;
    },

    logMessage: function (message) {
        Log(separator + message + "\r\n" + separator);
    },

    logAction: function (actionType, data) {
        if (actionMessages[actionType]) {
           var actionMessage = actionMessages[actionType](data);
           var bookState = BookUtils.getBookState(UserContext.book);
           var stateMessage = this.formatState(bookState);
           this.logMessage(actionMessage + stateMessage);
        }
    },

    logPriceChange: function (currentPrice, previousPrice, currentTime) {
        var message = "ULTIMO PREZZO: " + currentPrice + ", " +
                      "Precedente: " + previousPrice + ", " +
                      "Ora: " + currentTime;
        this.logMessage(message);
    }
};

function InitTradeContext(book, initialBidPrice, initialAskPrice) {
    this.book = book;
    this.order = { current: null, modified: false };
    this.status = { run: true, secondCount: 0, numOperazione: 1 };
    this.prices = { bid: { current: initialBidPrice, oldLevel: 0 }, ask: { current: initialAskPrice, oldLevel: 0 } };
    this.lastPrice = null;
    this.initialPriceLevel = lookup[CONST.ORDER_SIDE].level;
}

function InitPrices(book) {
    return { 
        bid: BookUtils.getData(book, 'Bid', 'Price', 0), 
        ask: BookUtils.getData(book, 'Ask', 'Price', 0) 
    };
}

function getTargetPriceLevel(sideUpper, priceLevel) {
    return (CONST.MONITORING_MODE === 'MONITORA_1level' ? priceLevel : lookup[sideUpper].level) - 1;
}

function PriceUpdate(side, book, priceLevel) {
    var sideUpper = side.toUpperCase();
    var sideLower = sideUpper.toLowerCase();
    var userContext = UserContext;
    var priceData = userContext.prices[sideLower];
    var lookupData = lookup[sideUpper];
    var targetPriceLevel = getTargetPriceLevel(sideUpper, priceLevel);
    var targetPrice = BookUtils.getData(book, lookupData.side, 'Price', targetPriceLevel);
    var oldPrice = priceData.oldLevel;

    if (targetPrice !== oldPrice) {
        var newOrder = OrderUtils.processOrModOrder(sideUpper, stock, targetPrice);
        if (newOrder) {
            priceData.current = targetPrice;

            Helper.logAction("Price Variation", { 
                order: newOrder, 
                lastLevel: priceLevel + Helper.PriceDirection(targetPrice, oldPrice), 
                priceLevel: targetPriceLevel 
            });

            userContext.status.secondCount = 0;
            userContext.status.numOperazione++;
        }
    }
}

function DetectPriceChange(side, book) {
    var sideUpper = side.toUpperCase();
    PriceUpdate(sideUpper, book, lookup[sideUpper].level);
}

function checkOps() {
    var status = UserContext.status;
    var currentOrder = UserContext.order.current;
    if (status.numOperazione >= CONST.MAX_OPERATIONS && currentOrder) {
        var deletedOrder = OrderUtils.deleteOrder(currentOrder.OrderCode);
        Helper.logAction("Order Deleted", { order: deletedOrder });
        Log("Ordine cancellato: " + currentOrder.OrderCode);
        status.run = false;
        return true;
    }
    return false;
}

function ManageCycle(priceLevel) {
    var status = UserContext.status;
    if (!status.run || checkOps()) return;

    if (status.secondCount >= CONST.SECONDS || priceLevel !== undefined) {
        DetectPriceChange(CONST.ORDER_SIDE, UserContext.book);
    }
}

function SetupTradeContext() {
    var book = Book(ps);
    var prices = InitPrices(book);
    UserContext = new InitTradeContext(book, prices.bid, prices.ask);
    Helper.logAction("Initialization Complete");
    ManageCycle(UserContext.initialPriceLevel);
}

function MarketEvent() {
    if (!UserContext.status.run) return;
    var eventType = SystemContext.EventType;
    var book = UserContext.book || Book(ps);
    UserContext.book = book;

    switch(eventType) {
        case TSEventType.Time:
            UserContext.status.secondCount++;
            ManageCycle();
            break;
        case TSEventType.Price:
            var currentPrice = Val(ps, "LAST");
            if (UserContext.lastPrice !== currentPrice) {
                var currentTime = Now().ToString("HH:mm:ss.ff");
                Helper.logPriceChange(currentPrice, UserContext.lastPrice, currentTime);
                UserContext.lastPrice = currentPrice;
            }
            break;
    }
}

if (SystemContext.IsFirst) {
    SetupTradeContext();
}

MarketEvent();