I'm having a hard time selecting the price_change of this array.

I tried like this but it doesn't work:

response.data[0].[1d].price_change

Any help is appreciated!

    var stockDiff = document.getElementById("stockDiffCrypto");
    var thePrice = response.data[0].["1d"].price_change;

if (thePrice > 0) {
    stockDiff.innerHTML = `<i class='fas fa-angle-double-up'></i>`
    stockDiff.style.color = "green"
} else {
    stockDiff.innerHTML = `<i class='fas fa-angle-double-down'></i>`
    stockDiff.style.color = "red"
}