/*********************************Provided By: eSignal (Copyright c eSignal), a division of Interactive Data Corporation. 2009. All rights reserved. This sample eSignal Formula Script (EFS) is for educational purposes only and may be modified and saved under a new file name. eSignal is not responsible for the functionality once modified. eSignal reserves the right to modify and overwrite this EFS file with each new release.Description: Trend LinesVersion: 1.0 09/14/2009 Formula Parameters: Default: Length 10 Notes: **********************************/var fpArray = new Array();var bInit = false;function preMain(){ setPriceStudy(true); setShowCursorLabel(false); setShowTitleParameters(false); setStudyTitle("Trend Lines"); var x = 0; fpArray[x] = new FunctionParameter("Length", FunctionParameter.NUMBER); with(fpArray[x++]) { setName("Length"); setLowerLimit(1); setDefault(10); } }var xLowest = null;var xHighest = null;var r1 = 0;var r2 = 0;var rt1 = 0;var rt2 = 0;var s1 = 0;var s2 = 0;var st1 = 0;var st2 = 0;function main(Length) {var nBarState = getBarState();var nPos = 0; var X, X1, X2, Y1, Y2, K; if (nBarState == BARSTATE_ALLBARS) { if(Length == null) Length = 10; } if (bInit == false) { xHighest = highest(Length, high()); xLowest = lowest(Length, low()); bInit = true; } if (xLowest.getValue(-nPos) == null || xHighest.getValue(-nPos) == null) return; nPos = Math.round((Length - 1)/2); if(low(-nPos) == xLowest.getValue(-1) && ((getCurrentBarCount() - nPos) - st1) >= nPos) { s2 = s1; s1 = low(-nPos); st2 = st1; st1 = getCurrentBarCount() - nPos; } if(high(-nPos) == xHighest.getValue(-1) && ((getCurrentBarCount() - nPos) - rt1) >= nPos) { r2=r1; r1 = high(-nPos); rt2 = rt1; rt1 = getCurrentBarCount() - nPos; } X1 = -(getCurrentBarCount() - st2); X2 = -(getCurrentBarCount() - st1); Y1 = s2; Y2 = s1; K = (Y2-Y1) / (X2-X1); X2 = X2 - Math.round(X1 / 2) + Length; Y2 = Y1 + K * (X2-X1); drawLineRelative(-(getCurrentBarCount() - st2), s2, X2, Y2, PS_SOLID, 2, Color.green, "Down"); X1 = -(getCurrentBarCount() - rt2); X2 = -(getCurrentBarCount() - rt1); Y1 = r2; Y2 = r1; K = (Y2-Y1) / (X2-X1); X2 = X2 - Math.round(X1 / 2) + 10; Y2 = Y1 + K * (X2-X1); drawLineRelative(-(getCurrentBarCount() - rt2), r2, X2, Y2, PS_SOLID, 2, Color.red, "Up"); return;} |
