Prettier Kraken complete orders table

KrakenOrdersComplete.js

var updateOrderColors = function(){
  var closedOrders = document.getElementById("DataTables_Table_1");
  if(closedOrders && closedOrders.children.length ==2){
      closedOrders = closedOrders.children[1];
      if(closedOrders.children.length){
        closedOrders = closedOrders.children
      
        for(i = 0;i < closedOrders.length;i++){
          var order = closedOrders[i];
          if(order.children[1].innerText == 'sell/limit')
            order.classList.add("sell");
    
          else if(order.children[1].innerText == 'buy/limit')
            order.classList.add("buy");
        }
      }
      
  }
  
  setTimeout(updateOrderColors, 1000);
}
updateOrderColors();
console.log("started custom script");