function m(v) {
  return v.toFixed(2).replace(/(\d)(?=(\d{3})+\.)/g, '$1,');
}

var cash = 400000;
var com_per_share = 0.0075;
var days = 100;
var interest = 1;
var avg_share_price = 30;
var margin_factor = 4;

var start_buying_power = (cash-25000) * margin_factor;
console.log("Initial buying power $" + m(start_buying_power));
var profit = 0;
var est_shares = 0;
var interest_factor = (1 + (interest/100));
var buying_power = start_buying_power;
for(var x = 0; x < days; x++) {
  var shares = (buying_power / avg_share_price);
  est_shares += shares;
  var com_fees = shares * com_per_share;
  earned = buying_power * interest_factor;
  earned -= com_fees;
  var trade_profit = (earned - buying_power);
  profit += trade_profit;
  cash += trade_profit;
  buying_power += trade_profit * margin_factor;

  console.log("Day " + (x+1) + " fees $" + m(com_fees) + " buying_power $" + m(buying_power) + " cash $" + m(cash) + " daily profit $" + m(trade_profit) + " total profit $" + m(profit));
}

console.log("\n");
console.log("Totals: buying_power $" + m(buying_power) + " profit $" + m(profit) + " cash $" + m(cash) + " estimated shares traded " + Math.round(est_shares));
var non_cmp_profit = Math.round(start_buying_power * Math.pow(interest_factor, days) - start_buying_power);
console.log("Non leveraged profit result $" + m(non_cmp_profit) + " leveraged profit difference $" + m(profit - non_cmp_profit));