Can we put void OnInit() and int OnCalculate() in one page?
Can we put void OnInit() and int OnCalculate() in one page?
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jjo mmax · External communityPost link
External question — Stack Overflow Stack Exchange
Author: jjo mmax
Original post: https://stackoverflow.com/questions/79669110
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
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When I write this code in MetaEditor:
#include <Trade\Trade.mqh>
CTrade md;
void OnInit()
{
md.BuyLimit(0.01, 3370, _Symbol, 0, 0,ORDER_TIME_DAY, 0, NULL);
}
It works. But when I add some codes to display "RSI", it doesn't work:
#include <Trade\Trade.mqh>
CTrade md;
void OnInit()
{
md.BuyLimit(0.01, 3370, _Symbol, 0, 0,ORDER_TIME_DAY, 0, NULL);
}
int i_COUNT, i_HANDLE, i_MA_PERIOD, i_START_POS;
double db_ARRAY_RSI[];
int OnCalculate(const int rates_total,
const int prev_calculated,
const datetime &time[],
const double &open[],
const double &high[],
const double &low[],
const double &close[],
const long &tick_volume[],
const long &volume[],
const int &spread[])
{
i_MA_PERIOD = 14;
i_HANDLE = iRSI(Symbol(), PERIOD_CURRENT, i_MA_PERIOD, PRICE_CLOSE);
i_START_POS = 0;
i_COUNT = 1;
CopyBuffer(i_HANDLE, 0, i_START_POS, i_COUNT, db_ARRAY_RSI);
Comment("db_ARRAY_RSI[0]: ", NormalizeDouble(db_ARRAY_RSI[0], 2), "abc");
return(rates_total);
}
My question is this: Can't we put both
"void OnInit()"
and
"int OnCalculate()"
in one expert?
I want to display
"RSI"
on the chart. How can I do that?
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Forex Coder · External communityPost link
External answer — Stack Overflow Stack Exchange
Author: Forex Coder
Original post: https://stackoverflow.com/a/79670421
License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/
Adaptation: HTML converted to plain text; contact email addresses removed.
Expert Advisors (programs that trade) cannot have
OnCalculate
functions.
OnInit
function must be an
int
and you return
INIT_FAILED
if the indicator cannot be loaded.
So this is the solution :
#include <Trade\Trade.mqh>
CTrade trade;
input int rsiPeriod=14;//period
int rsiHandle=INVALID_HANDLE;
int rsiWindow=-1;
int OnInit()
{
Print(EnumToString((ENUM_SYMBOL_INFO_INTEGER)18));
//start rsi indicator
rsiHandle=iRSI(_Symbol,_Period,rsiPeriod,PRICE_CLOSE);
if(rsiHandle!=INVALID_HANDLE){
//add the indicator
int windows=(int)ChartGetInteger(0,CHART_WINDOWS_TOTAL);
if(ChartIndicatorAdd(0,windows,rsiHandle)){
rsiWindow=windows;
}else{Alert("Cannot add rsi");ExpertRemove();return(INIT_FAILED);}
}else{Alert("Cannot start rsi");ExpertRemove();return(INIT_FAILED);
}
return(INIT_SUCCEEDED);
}
void OnTick()
{
//get rsi value
double value_return[];
if(CopyBuffer(rsiHandle,0,0,1,value_return)==1){
Comment("RSI "+DoubleToString(value_return[0],2));
}
}
void OnDeinit(const int reason)
{
if(rsiWindow>=1&&rsiHandle!=INVALID_HANDLE){
ChartIndicatorDelete(0,rsiWindow,"RSI("+IntegerToString(rsiPeriod)+")");
IndicatorRelease(rsiHandle);
}
}
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Quoted from Forex.com.bd-Editorial External answer — Stack Overflow Stack Exchange Author: Forex Coder Source score (net votes, not local likes): 0 Original post: https://stackoverflow.com/a/79670421 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Expert Advisors (programs that trade) cannot have OnCalculate functions. OnInit function must be an int and you return INIT_FAILED if the indicator cannot be loaded. So this is the solution : #include <Trade\Trade.mqh> CTrade trade; input int rsiPeriod=14;//period int rsiHandle=INVALID_HANDLE; int rsiWindow=-1; int OnInit() { Print(EnumToString((ENUM_SYMBOL_INFO_INTEGER)18)); //start rsi indicator rsiHandle=iRSI(_Symbol,_Period,rsiPeriod,PRICE_CLOSE); if(rsiHandle!=INVALID_HANDLE){ //add the indicator int windows=(int)ChartGetInteger(0,CHART_WINDOWS_TOTAL); if(ChartIndicatorAdd(0,windows,rsiHandle)){ rsiWindow=windows; }else{Alert("Cannot add rsi");ExpertRemove();return(INIT_FAILED);} }else{Alert("Cannot start rsi");ExpertRemove();return(INIT_FAILED); } return(INIT_SUCCEEDED); } void OnTick() { //get rsi value double value_return[]; if(CopyBuffer(rsiHandle,0,0,1,value_return)==1){ Comment("RSI "+DoubleToString(value_return[0],2)); } } void OnDeinit(const int reason) { if(rsiWindow>=1&&rsiHandle!=INVALID_HANDLE){ ChartIndicatorDelete(0,rsiWindow,"RSI("+IntegerToString(rsiPeriod)+")"); IndicatorRelease(rsiHandle); } }
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