/*********************************Provided By : eSignal. (c) Copyright 2003*********************************/function preMain() { setPriceStudy(true); setStudyTitle("Keltner (ATR Bands) "); setCursorLabelName("K-Upper", 0); setCursorLabelName("K-Basis", 1); setCursorLabelName("K-Lower", 2); setDefaultBarFgColor(Color.blue, 0); // upper setDefaultBarFgColor(Color.red, 1); // basis setDefaultBarFgColor(Color.blue, 2); // lower}function ATR(nInputLength) { var dSum = 0; var dH = high(0, -nInputLength); var dL = low(0, -nInputLength); var dC = close(-1, -nInputLength); if (dH == null || dL == null || dC == null) { return; } for (i = 0; i < nInputLength; ++i) { var vTrueHigh = Math.max(dH[i], dC[i]); var vTrueLow = Math.min(dL[i], dC[i]); var vTrueRange = (vTrueHigh - vTrueLow); dSum += vTrueRange; } dSum /= nInputLength; return dSum;}var BarCntr = 0;function main(nInputLength, nRangeFactor) { if(nInputLength == null) nInputLength = 20; if(nInputLength <= 0) nInputLength = 20; if(nRangeFactor == null) nRangeFactor = 2.5; if(nRangeFactor <= 0) nRangeFactor = 2.5; if (getBarState() == BARSTATE_NEWBAR) BarCntr += 1; if (BarCntr < nInputLength) { return; } else { var dKeltnerBasis= call("/Library/KeltnerEMA.efs", nInputLength); var dATR = ATR(nInputLength); return new Array(dKeltnerBasis + (nRangeFactor * dATR), dKeltnerBasis, dKeltnerBasis - (nRangeFactor * dATR)); }} |
