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would like to ask how do you facilitate communication between two or more running EAs. What I want to do is maintain a set upper limit on the percentage of equity at risk, and I want several EAs running on different currency pairs. Say the total at risk would be 10% and each trade is set at 1% risk. One way I see this is when an EA has a signal to open a trade, I want it to check a global variable that has the current total percentage at risk, if less than 10%, continue with the trade and increment the global variable (if not, forget the trade).
The question here is if the operation is atomic in execution, what little I remember from college OS concepts is that aside from the global variable containing the percentage at risk I also need a global variable saying whether or not the percentage at risk variable is in use (a lock so to speak). I believe there's a function that sets a value to a global variable but first checks it's current value, this could be used if it's execution is atomic right?
I asked here in case someone has already done this (or remembers their OS concepts course ).
I will be really good to create some script or tool in Metatrader to manage 2 or 3 EAs running (MM, risk, lot sizes and so on). But I don't think that it is easy. It is very difficult. I even can not imagine which kind of program can do it. But it should be very usefull.
Last edited by newdigital; 05-14-2006 at 08:49 AM.
You're talking about having a script or something to facilitate as a server for the EAs to be able to communicate. I think it'll take a while for metaquotes to come up with something like that. However looking at mql4.com, they say the function I was talking about, GlobalVariableSetOnCondition() is atomic in execution. With that, I can probably come up with a set of functions to do what I need.
Hi,
I’m looking for simple expert based on correlation.
Strategy:
If USDCHF jump up 2 pips, sell EURUSD
And vv, if USDCHF jump down 2 ticks, buy EURUSD
Thanks for help.
Bongo
I am trying to create an indicator that adjusts the signal line based on the value of RSI. Really I would like to draw another signal line on the MACD that is adjusted and leave the regular signal line in place.
edit:
I got the indicator to draw the RSI line (first step) in the same window. But for some reason it won't draw the last period. Please see attached.
herel is a bit of code im having a problem with//// it works when i load it up on northfinace 1time then never makes a trade again...but it doesnt do anything on Interbank... it is a reversal system using kama the .0005 is reversal pips...I have no idea whats going on, as it made 1 trade on northfinance perfectly when i first loaded it up, but it was an existing trade that should have already been made...
int BarCount;
int Current;
bool TickCheck = False;
//+------------------------------------------------------------------+
//| expert initialization function |
//+------------------------------------------------------------------+
int init() {
BarCount = Bars;
if (EachTickMode) Current = 0; else Current = 1;
return(0);
}
//+------------------------------------------------------------------+
//| expert deinitialization function |
//+------------------------------------------------------------------+
int deinit() {
return(0);
}
//+------------------------------------------------------------------+
//| expert start function |
//+------------------------------------------------------------------+
int start() {
int Order = SIGNAL_NONE;
int Total, Ticket;
double StopLossLevel, TakeProfitLevel;
if (EachTickMode && Bars != BarCount) TickCheck = False;
Total = OrdersTotal();
Order = SIGNAL_NONE;
//+------------------------------------------------------------------+
//| Variable Begin |
//+------------------------------------------------------------------+
//+------------------------------------------------------------------+
//| Signal Begin(Entry) |
//+------------------------------------------------------------------+
if (Buy1_1 >= Buy1_2 && Buy2_1 >= Buy2_2 && Buy3_1 >= Buy3_2) Order = SIGNAL_BUY;
if (Sell1_1 <= Sell1_2 && Sell2_1 <= Sell2_2 && Sell3_1 >= Sell3_2) Order = SIGNAL_SELL;
//+------------------------------------------------------------------+
//| Signal End |
//+------------------------------------------------------------------+
//Buy
if (Order == SIGNAL_BUY && ((EachTickMode && !TickCheck) || (!EachTickMode && (Bars != BarCount)))) {
if(!IsTrade) {
//Check free margin
if (AccountFreeMargin() < (1000 * Lots)) {
Print("We have no money. Free Margin = ", AccountFreeMargin());
return(0);
}
i changed the value of .0005 of the indicator in the expert as that only shows the channel line ultimately the levels are what you need to change 25,-25 for .0005 ...30,,-30 for .0006, and so on...
).
Help - Zero divide???
Linear Mode
