ema bands.afl

一个更精度的平滑涵数, 可用于股票交易系统.用于Amibroker 平台

//------------------------------------------------------------------------------
//
//  Formula Name:    Ema bands
//  Author/Uploader: dtholz 
//  E-mail:          [e-mail]
//  Date/Time Added: 2002-03-11 04:00:54
//  Origin:          
//  Keywords:        ema trending bands
//  Level:           basic
//  Flags:           exploration,indicator
//  Formula URL:     http://www.amibroker.com/library/formula.php?id=169
//  Details URL:     http://www.amibroker.com/library/detail.php?id=169
//
//------------------------------------------------------------------------------
//
//  ema offset bands easy to change 5 bands and ema period
//
//  indicator and AA scan .
//
//  this produced excellent results on the ASX ( aussie exchange)
//
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/* EMA offset bands ver 1_2
I'd guess this is NOT much different to bbands except you can contol the per % offset and the periods ema to off set*/
per=.10;//Percent placement
periods=20;//time periods
/*********************************/

emaverage= EMA(C,periods);
bandsAdjust=emaverage*per;

upperband=emaverage+bandsAdjust;
Lowerband=emaverage-bandsAdjust;
Plot(EMA(C,periods),"ema",5,1);
Plot(C,"EMA",15,64);// plots the close with candles
Plot(upperband,"upperband",3,1);// upperband
Plot(Lowerband,"lowerband",4,1);//lowerband

bCond1=Ref(Cross(C,Lowerband),-1) AND C > lowerband ;
bCond2= C > EMAverage ;// the "or" gets me into up trends 
bCond3= C > EMA(C,65);// trend

Buy = bcond1 AND bCond3 OR bCond2; 

scond1= Ref( Cross(emaverage,C),-1)AND C < emaverage;// close days under ema 
scond2=C < Lowerband;//failed trade drops below lowerband
Sell = scond1 OR scond2;

Buy = ExRem( Buy, Sell );// removes buy/sell arrows
Sell = ExRem( Sell, Buy );