A lot of people have seen this trick before but I have edited it so that you don't run the risk of losing all of your saved up bitcoin. I've gone fro 0.00007678 to 0.00008013 in a 5 minute span running this code.

First, go to http://freebitco.in/?r=1148 or http://cur.lv/5axi2 if you want to help me out.

Then just enter the following code in your browsers console.

var  minValue=1E-8,maxLoss=100,aimedProfit=10,maxOps=500000000000000,endResult=0,ops=0,bet=function(a,b,c){$.get("?op=double_your_btc&m="+(b?"lo":"hi")+"&stake="+a+"&multiplier=2&jackpot=0",function(d){d=d.split(":");$("#balance").html(d[3]);c(a,b,"w"===d[1])})},martingale=function(a,b,c){c||a>=maxLoss&&0!==maxLoss?(b=!b,newValue=minValue):newValue=2*a;endResult=c?endResult+a:endResult-a;console.log((c?"+":"-")+a);ops++;(ops<maxOps||0===maxOps)&&(endResult<aimedProfit||0===aimedProfit)?bet(newValue,b,martingale):
(console.log("Martingale finished in "+ops+" operations!"),console.log("Result: "+endResult))};martingale(minValue,!1,!1);

Just make sure to keep an eye on your balance so that you can exit the program if something goes amiss.