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Prague/ Czech Republic
Posts: 7 since Sep 2013
Thanks Given: 1
Thanks Received: 3
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I thought that OEC supports Easy Language, here is a LinearReg function from TS:
{ Linear Regression multiple-output function; see MULTIPLE-OUTPUT FUNCTIONS note
below }
inputs:
Price( numericseries ),
Length( numericsimple ), { Length > 1 }
TgtBar( numericsimple ), { use negative integer for future, positive for past }
oLRSlope( numericref ),
oLRAngle( numericref ),
oLRIntercept( numericref ), { left intercept, at vertical through
Price[ Length - 1 ] }
oLRValue( numericref ) ;
variables:
SumXY( 0 ),
SumY( 0 ),
SumX( 0 ),
SumXSqr( 0 ),
OneSixth( 1 / 6 ),
Divisor( 0 ) ;
if Length > 1 then
begin
SumX = Length * ( Length - 1 ) * .5 ;
SumXSqr = Length * ( Length - 1 ) * ( 2 * Length - 1 ) * OneSixth ;
Divisor = Square( SumX ) - Length * SumXSqr ;
SumXY = 0;
for Value1 = 0 to Length - 1
begin
SumXY = SumXY + Value1 * Price[Value1] ;
end ;
SumY = Summation( Price, Length ) ;
oLRSlope = ( Length * SumXY - SumX * SumY) / Divisor ;
oLRAngle = ArcTangent( oLRSlope ) ;
oLRIntercept = ( SumY - oLRSlope * SumX ) / Length ;
oLRValue = oLRIntercept + oLRSlope * ( Length - 1 + ExecOffset - TgtBar ) ;
LinearReg = 1 ;
end
else
LinearReg = -1 ;
{
MULTIPLE-OUTPUT FUNCTIONS
A multiple-output function has two types of parameters or "inputs" - input parameters
and input/output parameters. The values of the input parameters are passed into the
multiple-output function, but not modified by the function. The values of the input/
output parameters are passed into the multiple-output function, modified by it, and
the modified values are then inherited by - or output to - the calling routine.
The input/output parameters are often used for output purposes only, i.e., the
incoming values are ignored. The outputs are in addition to the function return. In
multiple-output functions, the function return is generally used to return an error
code, though sometimes the return may simply be a dummy value.
The input/output parameters are declared with a "ref" suffix (such as "numericref") in
the multiple-output function's declaration statements. For further clarity, the names
of the input/output parameters are generally prefixed with an "o" in the function as
well as in all the routines that call the function.
The built-in single-return WRAPPER FUNCTIONS that call the multiple-output functions
are specialized calling routines designed to offer simplified, alternate pathways to
the functionality of the underlying multiple-output functions. In the wrapper
functions, the input/output parameters are declared as local variables and generally
initialized to zero. They are passed through to the multiple-output function without
further modification. After the call, the wrapper function picks out the single
output of interest and assigns it as the return of the wrapper function.
}
{ ** Copyright (c) 2001 - 2010 TradeStation Technologies, Inc. All rights reserved. **
** TradeStation reserves the right to modify or overwrite this analysis technique
with each release. ** }
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