/*********************************Provided By: eSignal (Copyright c eSignal), a division of Interactive Data Corporation. 2008. 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: The Trendlines Automatic indicator plots trendlines at significant high and low points on a chart, helping to determine market direction, breakouts, and market reversals. Version: 1.0 08/08/2008Notes:* - -Formula Parameters: Default: * High Swing Strength 4 * Low Swing Strength 4 * Length of Rays 0 * Number Trendlines displayed 100 * Lookback period (# bars) 100 * Thickness Resistance lines 1 * Thickness Support lines 1 * Color Resistance lines Red * Color Support lines Blue * Display Title Parameters False**********************************/var fpArray = new Array();var LineIndexS = 0;var LineIndexR = 0;function preMain() { setPriceStudy(true); setStudyTitle("Auto Trend Lines"); setShowCursorLabel(false); askForInput(); var x=0; fpArray[x] = new FunctionParameter("SwHiStrength", FunctionParameter.NUMBER); with(fpArray[x++]){ setName("High Swing Strength"); setLowerLimit(1); setDefault(4); } fpArray[x] = new FunctionParameter("SwLoStrength", FunctionParameter.NUMBER); with(fpArray[x++]){ setName("Low Swing Strength"); setLowerLimit(1); setDefault(4); } fpArray[x] = new FunctionParameter("LengthRaysLine", FunctionParameter.NUMBER); with(fpArray[x++]){ setName("Length of Rays"); setLowerLimit(0); setDefault(0); } fpArray[x] = new FunctionParameter("NumberTrendLine", FunctionParameter.NUMBER); with(fpArray[x++]){ setName("Number Trendlines displayed"); setLowerLimit(1); setDefault(100); } fpArray[x] = new FunctionParameter("BackHistoryViewBars", FunctionParameter.NUMBER); with(fpArray[x++]){ setName("Lookback period (# bars)"); setLowerLimit(1); setDefault(100); } fpArray[x] = new FunctionParameter("ResistanceThickness", FunctionParameter.NUMBER); with(fpArray[x++]){ setName("Thickness Resistance lines"); setLowerLimit(1); setDefault(1); } fpArray[x] = new FunctionParameter("SupportThickness", FunctionParameter.NUMBER); with(fpArray[x++]){ setName("Thickness Support lines"); setLowerLimit(1); setDefault(1); } fpArray[x] = new FunctionParameter("ResistanceColor", FunctionParameter.COLOR); with(fpArray[x++]){ setName("Color Resistance lines"); setDefault(Color.red); } fpArray[x] = new FunctionParameter("SupportColor", FunctionParameter.COLOR); with(fpArray[x++]){ setName("Color Support lines"); setDefault(Color.blue); } fpArray[x] = new FunctionParameter("Parameters", FunctionParameter.BOOLEAN); with(fpArray[x++]){ setName("Display Title Parameters"); setDefault(false); } }function main(SwHiStrength, SwLoStrength, ResistanceThickness, ResistanceColor, SupportThickness, SupportColor, LengthRaysLine, NumberTrendLine, BackHistoryViewBars, Parameters) {var nVal;var nIndex = 0;var IndexOld = 0;var X, X1, X2, Y1, Y2, K;var nBarState = getBarState(); if(nBarState==BARSTATE_ALLBARS){ setShowTitleParameters(Parameters); } if (LineIndexS > NumberTrendLine) {LineIndexS = 1;} if (LineIndexR > NumberTrendLine) {LineIndexR = 1;} if(nBarState==BARSTATE_NEWBAR) { LineIndexS++; LineIndexR++; } nIndex = (SwHiStrength + 1); nVal = CreateResistance(nIndex, SwHiStrength); if(nVal == true){ IndexOld = getOldHiPoint(nIndex, SwHiStrength, BackHistoryViewBars); if (IndexOld != null) { X1 = -IndexOld; X2 = -nIndex; Y1 = high(X1); Y2 = high(X2); K = (Y2-Y1) / (X2-X1); X2 = X2 - Math.round(X1 / 2) + LengthRaysLine; Y2 = Y1 + K * (X2-X1); drawLineRelative( X1, Y1, X2, Y2 , PS_SOLID, ResistanceThickness, ResistanceColor, "Res"+LineIndexR ); } } nVal = CreateSupport(nIndex, SwHiStrength, NumberTrendLine); if(nVal == true){ IndexOld = getOldLoPoint(nIndex, SwHiStrength, BackHistoryViewBars); if (IndexOld != null) { X1 = -IndexOld; X2 = -nIndex; Y1 = low(X1); Y2 = low(X2); K = (Y2-Y1) / (X2-X1); X2 = X2 - Math.round(X1 / 2) + LengthRaysLine; Y2 = Y1 + K * (X2-X1); drawLineRelative(X1, Y1, X2, Y2, PS_SOLID, SupportThickness, SupportColor, "Sup"+LineIndexS ); } } return null;}function CreateResistance(Index, SwHiStrength) {var Price = high(-Index);var ResistanceOK = true;var tmp; for(var i =(Index + SwHiStrength); i>Index; i--){ tmp = i-SwHiStrength-1; if(Price < high(-i)) { ResistanceOK = false; } if(Price < high(-tmp)) {ResistanceOK = false; } } if (ResistanceOK == true) { return true; } else { return false; }}function CreateSupport(Index, SwHiStrength) {var Price = low(-Index);var ResistanceOK = true;var tmp; for(var i =(Index + SwHiStrength); i>Index; i--){ tmp = i-SwHiStrength-1; if(Price > low(-i)) { ResistanceOK = false; } if(Price >= low(-tmp)) {ResistanceOK = false; } } if (ResistanceOK == true) { return true; } else { return false; }}function getOldHiPoint(Index, SwHiStrength, BackHistoryViewBars){var i = Index + 1;var Work = true;var PriceBarNow = high(-Index); while(Work == true) { if (CreateResistance(i, SwHiStrength) == true) { if(high(-i) > PriceBarNow) { Work = false; } } i++; if (i > BackHistoryViewBars) return; } return i - 1;}function getOldLoPoint(Index, SwHiStrength, BackHistoryViewBars){var i = Index + 1;var Work = true;var PriceBarNow = low(-Index); while(Work == true) { if (CreateSupport(i, SwHiStrength) == true) { if(low(-i) < PriceBarNow) { Work = false; } } i++; if (i > BackHistoryViewBars) return; } return i - 1;} |
