or try this

var belance = document.getElementById('pct_balance').value;
document.getElementById('pct_chance').value = 49.5;
document.getElementById('pct_payout').value = 2;
var bob = (belance/50000).toFixed(8);
var target = (belance*1.1);
parseFloat(document.getElementById('pct_bet').value = bob);
parseFloat(document.getElementById('pct_profit').value = (((bob*10)-bob).toFixed(8)));
var old = document.getElementById('pct_balance').value;
var olda = document.getElementById('pct_balance').value;
var older = document.getElementById('pct_balance').value;
var olderest = document.getElementById('pct_balance').value
var x = bob
var wall = document.getElementById('pct_balance').value
 var balance=document.getElementById('pct_balance').value;
var v = 10000000
var win;
var nextbet;
var shit = 0;

function go() {
var classes = document.getElementsByClassName("fancybox-item fancybox-close");
var Rate = classes[0];
setTimeout(Rate.click(), 52);}

function invest() {
  balance = document.getElementById('pct_balance').value;
  $('#invest_edit').click();
  setTimeout(function(){document.getElementById('invest_input').value = (balance-wall);}, 500);
  setTimeout(function(){ $('#invest_button').click();}, 510);
  setTimeout(function(){go();}, 520);
}
function divest() {
  balance = document.getElementById('pct_balance').value;
  $('#invest_edit').click();
  setTimeout(function(){document.getElementById('divest_input').value = (wall-balance);}, 500);
  setTimeout(function(){ $('#divest_button').click();}, 510);
  setTimeout(function(){go();}, 520);
}
function dobet(){
console.clear()
var balance=document.getElementById('pct_balance').value;
var previousbet = document.getElementById('pct_bet').value;
document.getElementById('pct_chance').value = 49.5;
document.getElementById('pct_payout').value = 2;
  if (balance<(old-(x*4))) {
    nextbet = previousbet*2;
    x       = nextbet;
    old     = parseFloat(balance);
    }
 if (balance>old) {
      old = parseFloat(balance);
  }
  if (balance>(olda+(x*6))) {
    nextbet = previousbet*2;
    x       = nextbet;
    olda    = parseFloat(balance);
    }
  if (balance<olda) {
      olda = parseFloat(balance);
    }
  if (balance>(older+(bob*9))) {
    nextbet = bob;
    x       = bob;
    old     = parseFloat(balance);
    olda    = parseFloat(balance);
    older   = parseFloat(balance);
    }
if (nextbet==null) {
nextbet=previousbet;
}
if (balance>=target) {
    invest();
balance=document.getElementById('pct_balance').value;
    nextbet = bob;
    shit = shit+1;
    x       = bob;
    old     = wall;
    olda    = wall;
    older   = wall;
}
if (balance<=(wall*0.8)){
    divest();
    balance=document.getElementById('pct_balance').value;
    nextbet = bob;
    shit = shit+1;
    x       = bob;
    old     = wall;
    olda    = wall;
    older   = wall;
}
if (shit>=12){
//stop();
}
var freak = ((balance-olderest).toFixed(8));
console.log("balance made");
console.log(freak);
parseFloat(document.getElementById('pct_bet').value = (((nextbet*2)-nextbet).toFixed(8)));
parseFloat(document.getElementById('pct_profit').value = (((nextbet*2)-nextbet).toFixed(8)));
setTimeout(function(){$('#a_lo').click();}, 1100);}
setInterval(() => dobet(), 1200);