哪位能把下边这段mql5代码翻译一下？
//+------------------------------------------------------------------+
//| Custom indicator initialization function | 自定义指标初始化功能
//+------------------------------------------------------------------+
int OnInit()
{
//---- indicator buffers mapping
SetIndexBuffer(0,fillu,INDICATOR_DATA);
SetIndexBuffer(1,filld,INDICATOR_DATA);
SetIndexBuffer(2,levelUp,INDICATOR_DATA);
SetIndexBuffer(3,levelDn,INDICATOR_DATA);
SetIndexBuffer(4,val,INDICATOR_DATA);
SetIndexBuffer(5,valc,INDICATOR_COLOR_INDEX);
SetIndexBuffer(6,atr,INDICATOR_CALCULATIONS);
PlotIndexSetInteger(0,PLOT_SHOW_DATA,false);
//----
_atrPeriod = MathMax((int)inpPeriod,1);
_atrHandle = iATR(_Symbol,0,_atrPeriod); if (!_checkHandle(_atrHandle)) return(INIT_FAILED);
_levelsPeriod = (inpPeriodl<=1 ? inpPeriod : inpPeriodl);
//----
IndicatorSetString(INDICATOR_SHORTNAME,"Laguerre filter levels ("+(string)inpPeriod+")");
return(INIT_SUCCEEDED);
}
//+------------------------------------------------------------------+
//| Custom indicator iteration function | 自定义指标迭代函数
//+------------------------------------------------------------------+
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[])
{
if(BarsCalculated(_atrHandle)
//
//---
//
int _copyCount = MathMin(rates_total-prev_calculated+1,rates_total);
if (CopyBuffer(_atrHandle,0,0,_copyCount,atr)!=_copyCount) return(prev_calculated);
//
//---
//
int i=(int)MathMax(prev_calculated-1,0); for(; i
int _start = MathMax(i-_atrPeriod+1,0);
double _max = atr[ArrayMaximum(atr,_start,_atrPeriod)];
double _min = atr[ArrayMinimum(atr,_start,_atrPeriod)];
double _coeff = (_min!=_max) ? 1-(atr[i]-_min)/(_max-_min) : 0.5;
_coeff = (_coeff+1.0)/2.0;
val[i] = iLaGuerreFil(getPrice(inpPrice,open,close,high,low,i),inpPeriod*_coeff,i,0);
double _levelUp = iLaGuerreFil(val[i],_levelsPeriod*_coeff,i,1,(i>0 ? !(val[i]>levelDn[i-1]) : false));
double _levelDn = iLaGuerreFil(val[i],_levelsPeriod*_coeff,i,2,(i>0 ? !(val[i]
levelDn[i] = MathMin(_levelUp,_levelDn);
valc[i] = (val[i]>levelUp[i]) ? 1 : (val[i]
fillu[i] = (inpDisplay==fill_dont) ? EMPTY_VALUE : val[i];
filld[i] = (inpDisplay==fill_dont) ? EMPTY_VALUE : (valc[i]==0) ? val[i] : (valc[i]==1) ? levelUp[i] : levelDn[i];
}
return(i);
}
//+------------------------------------------------------------------+
//| Custom functions |自定义函数
//+------------------------------------------------------------------+
#define _lagFilInstances 3
#define _lagFilInstancesSize 4
#define _lagFilRingSize 6
double workLagFil[_lagFilRingSize][_lagFilInstances*_lagFilInstancesSize];
double iLaGuerreFil(double price, double period, int i, int instance=0, bool copy=false)
{
int _indC = (i )%_lagFilRingSize;
int _indP = (i-1)%_lagFilRingSize;
int _inst = instance*_lagFilInstancesSize;
//
//---
//
if (!copy && i>0 && period>1)
{
double _gamma = 1.0 - 10.0/(period+9.0);
workLagFil[_indC][_inst ] = price + _gamma*(workLagFil[_indP][_inst ] - price );
workLagFil[_indC][_inst+1] = workLagFil[_indP][_inst ] + _gamma*(workLagFil[_indP][_inst+1] - workLagFil[_indC][_inst ]);
workLagFil[_indC][_inst+2] = workLagFil[_indP][_inst+1] + _gamma*(workLagFil[_indP][_inst+2] - workLagFil[_indC][_inst+1]);
workLagFil[_indC][_inst+3] = workLagFil[_indP][_inst+2] + _gamma*(workLagFil[_indP][_inst+3] - workLagFil[_indC][_inst+2]);
}
else for (int k=0; k<_lagFilInstancesSize; k++) workLagFil[_indC][_inst+k]= (copy && i>0) ? workLagFil[_indP][_inst+k] : price;
//
//---
//
return((workLagFil[_indC][_inst]+2.0*workLagFil[_indC][_inst+1]+2.0*workLagFil[_indC][_inst+2]+workLagFil[_indC][_inst+3])/6.0);
}
//
//---
//
double getPrice(ENUM_APPLIED_PRICE tprice,const double &open[],const double &close[],const double &high[],const double &low[],int i)
{
if(i>=0)
switch(tprice)
{
case PRICE_CLOSE: return(close[i]);
case PRICE_OPEN: return(open[i]);
case PRICE_HIGH: return(high[i]);
case PRICE_LOW: return(low[i]);
case PRICE_MEDIAN: return((high[i]+low[i])/2.0);
case PRICE_TYPICAL: return((high[i]+low[i]+close[i])/3.0);
case PRICE_WEIGHTED: return((high[i]+low[i]+close[i]+close[i])/4.0);
}
return(0);
}
//
//---
//
bool _checkHandle(int _handle)
{
static int _handles[];
int _size = ArraySize(_handles);
if (_handle!=INVALID_HANDLE)
{
ArrayResize(_handles,_size+1);
_handles[_size]=_handle;
return(true);
}
for (int i=_size-1; i>0; i--)
IndicatorRelease(_handles[i]); ArrayResize(_handles,0);
return(false);
}
//+------------------------------------------------------------------+