ref()
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ref( barIndex )
The ref() function allows you to retrieve prior values for a built-in study (or studies). If multiple return values are being used then the ref() function will return its results in an array.
Parameters
Usage
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ref( barIndex )
The ref() function allows you to retrieve prior values for a built-in study (or studies). If multiple return values are being used then the ref() function will return its results in an array.
Parameters
barIndex |
offset indicating which historical indicator data points to retrieve |
Usage
var study1 = null; var study2 = null; var bInit = false; var BarCntr = 0; function preMain() { setPriceStudy(true); } function main() { var nMA1; var nMA2; var myRef; var myValue1, myValue2; if ( bInit==false ) { study1 = sma( 10 ); study2 = sma( 20 ); bInit=true; } nMA1 = study1.getValue(0); nMA2 = study2.getValue(0); if (getBarState() == BARSTATE_NEWBAR) { BarCntr += 1; }
/*** BarCntr logic ***/ // We're using 20 because our longest sma() requires a minimum of 20 bars.
if (BarCntr > 20) { //myRef will now contain the two MA values from the prior bar. //they will be in an array so we need to treat them as such myRef = ref(-1); if ( myRef != null ) { myValue1 = myRef[0]; myValue2 = myRef[1]; } } // Open the Formula Output Window from the tools menu to view the values of myRef. if (BarCntr > 20) { debugPrintln("Bar Index: " + getCurrentBarIndex() + " myValue1= " + myValue1 + " myValue2= " + myValue2); } return new Array( nMA1, nMA2 ); }