TradingView Buy/Sell Helper

tradingview-buy-sell-helper.js

async function postData(url = '', data = {}) {
    const response = await fetch(url, {
      method: 'POST', // *GET, POST, PUT, DELETE, etc.
      cache: 'no-cache', // *default, no-cache, reload, force-cache, only-if-cached
      credentials: 'include', // include, *same-origin, omit
      redirect: 'follow', // manual, *follow, error
      referrerPolicy: 'no-referrer', // no-referrer, *no-referrer-when-downgrade, origin, origin-when-cross-origin, same-origin, strict-origin, strict-origin-when-cross-origin, unsafe-url
      body: JSON.stringify(data) // body data type must match "Content-Type" header
    });
    return response.json(); // parses JSON response into native JavaScript objects
};

let hideGrowls = () => {
    document.querySelector('[data-role="toast-container"]').setAttribute('style', 'hidden;');
}

let getBalance = () => {
    const balance = parseFloat(document.querySelectorAll('.tv-account-manager__summary.js-summary .tv-account-manager__el.js-2 .tv-account-manager__data.js-collateral-value')[0].textContent.replace(/[\s\$]/g, ''));
    return balance;
}

let lastOrderAmt = 0;

let buy = () => {
    const balance = getBalance();
    console.log(`Balance: ${balance}`);
    const orderAmt = balance * 0.10;
    console.log(`Order: ${orderAmt} (10% of balance)`);
    let buyOrder = {
        symbol: "COINBASE:BTCUSD",
        side: "buy",
        type: "market",
        "qty": orderAmt
    };
    
    postData('https://papertrading.tradingview.com/trading/place/', buyOrder)
      .then(data => {
        console.log(data); // JSON data parsed by `data.json()` call
        lastOrderAmt = orderAmt;
      });
    hideGrowls();
};

let displayValue = (value, color) => {
    const elem = document.createElement('div');
    elem.innerHTML = value;
    elem.setAttribute('class', 'fooval');
    elem.setAttribute('style', `
        color: ${color};
        font-size: 100px;
        text-align: center;
        margin-top: 10%;
        z-index: 999999;
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height 100%;
    `);
    const body = document.querySelector('body');
    body.appendChild(elem);
    setTimeout(() => {
        body.removeChild(elem);
    }, 1500);
}


let sell = () => {
    let sellOrder = {
        symbol: "COINBASE:BTCUSD",
        side: "sell",
        type: "market",
        qty: lastOrderAmt
    };
    
    postData('https://papertrading.tradingview.com/trading/place/', sellOrder)
      .then(data => {
        console.log(data); // JSON data parsed by `data.json()` call
        document.querySelectorAll('.tv-tabs__tab.js-tab')[5].click();
        setTimeout(() => {
            const cell = document.querySelectorAll('.tv-data-table.tv-data-table--trading-cqg.balances tr td')[3];
            let color = "#CCC";
            if (cell.className.includes('v-data-table__green-text')) {
                color = "#0F0";
            } else if (cell.className.includes('v-data-table__red-text')) {
                color = "#F00";
            }
            const value = cell.textContent.replace(/\s/g, ',');
            const valNum = parseFloat(cell.textContent
               .replace(/\s/g, '')
               .replace(/\$/g, '')
               .replace(/\,/g, ''));
            displayValue(`$${value}`, color);
            console.log(valNum);
        }, 1000)
      });
    hideGrowls();
};

function keyUp(e) {
    if (e.ctrlKey && e.keyCode == 66) {
        return buy();
    }
    if (e.ctrlKey && e.keyCode == 83) {
        return sell();
    }
}
// register the handler 
document.addEventListener('keyup', keyUp, false);