Is there a way to listen for a when a variable changes?
I am trying to do something along the lines of:
If( *variable changes* ){
Buy=true;
}
I am pretty sure this would involve some type of loop, but I cannot seem to get it to work without doing something more complicated that involves multiple variables.
Is there a simple way to do this?
What kind of data does the variable carry?
What kind of data does the variable carry?
At the moment the variable is (string Indicator="buy"). I am using it for "buy" and "sell" only.
who controls the variable
It is inside of an EA I am making.
More specifically however, the buy/sell signals are generated off of readings from the iSAR indicator (Parabolic indicator).
It is inside of an EA I am making.
More specifically however, the buy/sell signals are generated off of readings from the iSAR indicator (Parabolic indicator).
Great . So you are reading the iSAR indicator essentially .
So you need to see when the values you read change .
Thats in every Tick (OnTick())
So in there you will place the controls to associate the value of your Indicator string with iSAR values.
Great . So you are reading the iSAR indicator essentially .
So you need to see when the values you read change .
Thats in every Tick (OnTick())
So in there you will place the controls to associate the value of your Indicator string with iSAR values.
OK thanks!
One other thing. Although I am only using the iSAR indicator at the moment, my intention is to incorporate stop/start functions depending on the time of day, other indicators, etc.
The problem I am running in to is that my EA will buy right at the start of when it reaches a certain time of day or the chart is within acceptable perimeters of other functions. This often causes the EA to open a trade towards the middle or end of each Parabola, which usually ends up in a loss of money. I am trying to trigger the buy/sell functions only when the iSAR flips so it will eliminate that problem.
I am new to mql4, so all of the help is greatly apreaciated!!!
- www.mql5.com
OK thanks!
One other thing. Although I am only using the iSAR indicator at the moment, my intention is to incorporate stop/start functions depending on the time of day, other indicators, etc.
The problem I am running in to is that my EA will buy right at the start of when it reaches a certain time of day or the chart is within acceptable perimeters of other functions. This often causes the EA to open a trade towards the middle or end of each Parabola, which usually ends up in a loss of money. I am trying to trigger the buy/sell functions only when the iSAR flips so it will eliminate that problem.
Yeah , you need to monitor for a change in conditions not just the conditions being valid .
//global string isradirection="none"; //in the monitoring on tick after the time checks string newdirection="none"; //do your calcs , assing signal to newdirection if(newdirection=="buy"&&isradirection=="sell") //when none its blocked if(newdirection=="sell&&isradirection=="buy") //same isradirection=newdirection;
Yeah , you need to monitor for a change in conditions not just the conditions being valid .
Thanks!
You are welcome.
Dont forget to set the value to "none" if time -or when time- becomes invalid
// Global variables string SAR_Old="none"; void OnTick() { string SAR_Ind="none"; // Requirment status for SAR: Buy/Sell //-------------------------------------------------------------------- // calculate SAR value double SAR = iSAR(_Symbol,_Period,.02,.2,0); //-------------------------------------------------------------------- // Defining buy/sell signals for SAR if(SAR<Bid) { SAR_Ind="buy"; } if(SAR>Ask) { SAR_Ind="sell"; } Comment("The signal is: ",SAR_Ind); //-------------------------------------------------------------------- // Determining buy/sell signal switch ******* if(SAR_Ind=="buy" && SAR_Old=="sell"){ // Signal switches from sell to buy; allows trade Alert("1 ");} if(SAR_Ind=="sell" && SAR_Old=="buy"){ // Signal switches from buy to sell; allows trade Alert("2 ");} SAR_Old=SAR_Ind; }
You are welcome.
Dont forget to set the value to "none" if time -or when time- becomes invalid
Hey Lorentzos,
I am having a bizarre problem with my code regarding this problem.
Determining when there is a switch within the iSAR works, but it is only triggered for the second condition, Alert("2").
After testing over a long period the first condition, Alert("1"), would only trigger once, maybe twice, while the second condition would trigger many many times.
Am I setting it up incorrectly?
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I am trying to do something along the lines of:
If( *variable changes* ){
Buy=true;
}
I am pretty sure this would involve some type of loop, but I cannot seem to get it to work without doing something more complicated that involves multiple variables.
Is there a simple way to do this?