Help! how do I lock my indicator to an mt4 account

please i really need help , i have an indicator i made but i am looking for how to lock it to only work on specific mt4 account that has been added to it. please find the source code ,if there is a code i need to use please help and show how and where to put it am still new to mql

//+---------------------------------------------------------------------+
//| trendstar.mq4|
//| |
//+---------------------------------------------------------------------+
#property strict
#property copyright " trendstar"
#property link "http://www.xxxxxx.com "
#property indicator_chart_window
#property indicator_buffers 3
//Buy signal
#property indicator_color1 OrangeRed
#property indicator_width1 1
#property indicator_style1 STYLE_SOLID
//Sell signal
#property indicator_color2 OrangeRed
#property indicator_width2 1
#property indicator_style2 STYLE_SOLID
//Lot size
#property indicator_color3 CLR_NONE
#property indicator_width3 0
//Conditions
//

string _name = " trendstar";
string _ver="v2.2";
bool _enableAlert=true;
//---------------------------------------------

//lot size is constant
double _lotSizeDefault=0;
//---------------------------------------------
double _buySignal[];
double _sellSignal[];
double _lotSize[];
//

double _pipsMultiplyer=1;

int init()
{
Print(_name+" - " + _ver);
IndicatorShortName(_name+" - " + _ver);
Comment(_name+" " + _ver+" @ "+"http://www.xxxxx.com");
_lotSizeDefault=MarketInfo(Symbol(),MODE_MINLOT);
//init buffers
IndicatorBuffers(3);
SetIndexBuffer(0,_buySignal);
SetIndexStyle(0,DRAW_ARROW);
SetIndexLabel(0,"Buy");
SetIndexArrow(0,233);

SetIndexBuffer(1,_sellSignal);
SetIndexStyle(1,DRAW_ARROW);
SetIndexLabel(1,"Sell");
SetIndexArrow(1,234);
SetIndexBuffer(2,_lotSize);
SetIndexStyle(2,DRAW_NONE);
SetIndexLabel(2,"Lot");

//conditions


//get pip value
if(Digits == 2 || Digits == 4) {
_pipsMultiplyer = 1;
} else {
if(Digits == 3 || Digits == 5) {
_pipsMultiplyer = 10;
}
}
return(0);
}
int deinit()
{
return(0);
}
//conditions
//cross
bool IsCrossUp(double lineX0, double lineX1, double lineY0, double lineY1){
if(lineX1<lineY1 && lineX0>lineY0){
return (true);
}
return (false);
}
bool IsCrossDown(double lineX0, double lineX1, double lineY0, double lineY1){
if(lineX1>lineY1 && lineX0<lineY0){
return (true);
}
return (false);
}
//Direction
bool IsPointingUp(double lineX0, double lineX1){
if(lineX1<lineX0){
return (true);
}
return (false);
}
bool IsPointingDown(double lineX0, double lineX1){
if(lineX1>lineX0){
return (true);
}
return (false);
}
//level
bool IsAbove(double lineX0, double lineY0){
if(lineX0>lineY0){
return (true);
}
return (false);
}
bool IsBelow(double lineX0, double lineY0){
if(lineX0<lineY0){
return (true);
}
return (false);
}
//extremum
bool IsMaximum(double lineX0, double lineX1, double lineX2){
if(lineX0<lineX1 && lineX1>lineX2){
return (true);
}
return (false);
}
bool IsMinimum(double lineX0, double lineX1, double lineX2){
if(lineX0>lineX1 && lineX1<lineX2){
return (true);
}
return (false);
}
bool IsBuySignal(int i){
bool result=true;
int met=0;
double pipAdd=200*Point;
//buy conditions
if(!Condition1(i)){
result=false; //Condition1
}
if(!Condition3(i)){
result=false; //Condition3
}
if(!Condition5(i)){
result=false; //Condition5
}
return (result);
}
bool IsSellSignal(int i){
bool result=true;
int met=0;
double pipAdd=200*Point;
//sell conditions
if(!Condition2(i)){
result=false; //Condition2
}
if(!Condition4(i)){
result=false; //Condition4
}
if(!Condition6(i)){
result=false; //Condition6
}

return (result);
}
int start()
{
double visualAddition= 3*_pipsMultiplyer*Point;
int counted_bars=IndicatorCounted();
if(Bars<=100) {return(0);}
int i=Bars-counted_bars-1;
while(i>=0)
{
_buySignal[i]=EMPTY_VALUE;
_sellSignal[i]=EMPTY_VALUE;
_lotSize[i]=_lotSizeDefault;
if(IsBuySignal(i)){
_buySignal[i]=iLow(Symbol(),Period(),i)-visualAddition;
if(_enableAlert){
if(i==1){
Alert("BUY "+Symbol()+" "+IntegerToString(Period(),2,' ')+_name);
}
}
}
if(IsSellSignal(i)){
_sellSignal[i]=iHigh(Symbol(),Period(),i)+visualAddition;
if(_enableAlert){
if(i==1){
Alert("SELL "+Symbol()+" "+IntegerToString(Period(),2,' ')+_name);
}
}
}
i--;
}
return(0);
}

//Conditions
bool Condition1(int i){
bool result;
double lineX0 = iRSI(Symbol(),Period(),14, 3, i+0);
double lineX1 = iRSI(Symbol(),Period(),14, 3, i+1);
double lineX2 = iRSI(Symbol(),Period(),14, 3, i+2);
result = IsMinimum(lineX0,lineX1,lineX2);
return (result);
}
bool Condition2(int i){
bool result;
double lineX0 = iRSI(Symbol(),Period(),14, 2, i+0);
double lineX1 = iRSI(Symbol(),Period(),14, 2, i+1);
double lineX2 = iRSI(Symbol(),Period(),14, 2, i+2);
result = IsMaximum(lineX0,lineX1,lineX2);
return (result);
}
bool Condition3(int i){
bool result;
double lineX0 = iMA(Symbol(),Period(),50,0,0,0,i+0);
double lineX1 = iMA(Symbol(),Period(),50,0,0,0,i+1);
double lineY0 = iMA(Symbol(),Period(),100,0,0,0,i+0);
double lineY1 = iMA(Symbol(),Period(),100,0,0,0,i+1);
result = IsBelow(lineX0,lineY0);
return (result);
}
bool Condition4(int i){
bool result;
double lineX0 = iMA(Symbol(),Period(),50,0,0,0,i+0);
double lineX1 = iMA(Symbol(),Period(),50,0,0,0,i+1);
double lineY0 = iMA(Symbol(),Period(),100,0,0,0,i+0);
double lineY1 = iMA(Symbol(),Period(),100,0,0,0,i+1);
result = IsAbove(lineX0,lineY0);
return (result);
}
bool Condition5(int i){
bool result;
double lineX0 = iMA(Symbol(),Period(),5,0,3,0,i+0);
double lineX1 = iMA(Symbol(),Period(),5,0,3,0,i+1);
double lineY0 = iMA(Symbol(),Period(),30,0,2,3,i+0);
double lineY1 = iMA(Symbol(),Period(),30,0,2,3,i+1);
result = IsCrossUp(lineX0,lineX1,lineY0,lineY1);
return (result);
}
bool Condition6(int i){
bool result;
double lineX0 = iMA(Symbol(),Period(),5,0,3,0,i+0);
double lineX1 = iMA(Symbol(),Period(),5,0,3,0,i+1);
double lineY0 = iMA(Symbol(),Period(),30,0,2,2,i+0);
double lineY1 = iMA(Symbol(),Period(),30,0,2,2,i+1);
result = IsCrossDown(lineX0,lineX1,lineY0,lineY1);
return (result);
}

Let's say your account number is 123456

Just add this line in the beginning of init() function :

thanks alot bro, it worked , what if i want to put an expiry date how do i do it please?

explain more for which purpose you want an 'expiry date'

If you wrote that indicator, then you should be able to write a locking/protection you need in no time
On the other hand, if you didn't (write it), then what are you trying to "lock/protect"?

This indicator has nothing special. Why do you have to impose these restrictions?.

i want to use it to learn how to add expiry dates to indicator, it just a practice indicator

i am using it to practice and learn how to add expiry date

i am just learning to that will some free tools online

sir i want one ea writing. pls contact +917550315853

save it in exfile

please do you know how to add expiry date to mt4 indicator?

send me file,

i will code for you,

- jesing

i already try it. but if i put wrong acc number also can login. please advice

Securing Indicators and EAs from Unauthorized Use

The only reason I know for locking an indicator or EA to an account number is for copy protection, i.e. to prevent unauthorized use. The MQL solution paulselvan provided is a simple way but is pretty easy to bypass, all that a hacker need do is replace the "if()" test with a JMP instruction to step over the "return()" and continue execution from the next instruction. MQL is not a very secure compiler, easy to decompile.

For a higher security method I'd suggest putting the key calculations of the indicator in a DLL and passing the account number and current date/time with the arguments to the function. The DLL function would be written so that it would not perform the key calculation unless the account number was correct. DLL functions can also be decompiled, but it requires a higher degree of skill.

Additional degrees of security can be achieved by taking further measures to increase the difficulty of bypassing the copy protection, such as:

1. Pass the account number and password through a one-way hash before further checking it for validity. This would prevent someone from being able to determine the expected account number or password simply by studying the compiled code.
2. Code obfuscation: insert large numbers of meaningless instructions in the copy protection code. The hacker would have to manually read and analyze all of it to figure out how to bypass it.
3. Include a high security password encryption algorithm such as Elliptic Curve or Triple AES.

The steps mentioned in the above bullet points would greatly slow down the execution of a function that is called frequently to calculate an indicator value, so you would need to work out how to establish and maintain the security without incurring the performance penalty.

Does all this sound difficult to do? It is. It's a thousand times harder than looking up which MQL function call is used to return the account number and you're not going to find quick and dirty solutions on a forum -- not if you want real security. If you need real security there's no shortcut, you are going to have to dig in, develop real programming skills and do the hard work.

If it comes to that level every hack/crack is the same. That's no argument, this can also be done in any DLL or other executable.

I would love this when i'm a cracker or hacker. One simple wrapper and you got all access to the whole communication between MQL and the DLL. It's like open the door wide open. Since there are much more tools to decompile DLL's you also give the possible hacker a lot more options than he has with pure MQL.

I agree that you have to use better encryption/decryption methods. Since all build in are symetric they are worthless. Implementation of a assymetric one is vital to get a secure communication from MT4 to any licence server or calculation server. The most secure solution these days are to hide the calculation on the server and using MQL without logic only showing the calculation results it get's from this server. Even if the MQL get's decompiled you got worthless stuff decompiled and the IP is still in a save environment on the server.

Yep. You could also write your own exerciser for the DLL if you wanted to study its responses or flood it with account number/license key guesses until you found one that worked. Unless the copy protection is hardened against such attacks.

Putting the calculation on a remote server of course secures the code against cracking but then there's the cost and effort of setting up and maintaining the server and managing the user access rights. Also consider the round-trip time: if there is 0.1 second response time from the server, a 60,000 bar chart would require 100 minutes to draw. There are ways to solve the response time issues, but it adds to the work load required.

I like the idea of self-modifying code -- so that the code itself isn't complete unless the user supplies the correct licensing information.

Copy protection is an arms race, whichever party is willing to invest more time and effort will win. The usual reasoning behind most copy protection approaches is not to make cracking impossible but to make the effort required so large that paying $29.25 for a valid license is dirt cheap by comparison.

Fortunately not the server has to draw the information when using MT4 & MQL. I'm thinking more about a simple json that gets encrypted with all the relevant results for the given indicator or ea. Of course the traffic will increase with any additional information the client has to gather from the server.

Sometimes it isn't the effort. Back in the days we have done this for the fun and the glory. $1.99 or $4999 per licence we didn't care. The glory increased with the quality of the protection.

Arrrrr, who be the greatest pirate on the seven seas? Cap'n Jens Sparrow!