How can I create a filter to find a trend using Bollinger Bands

StockFetcher Forums · General Discussion · How can I create a filter to find a trend using Bollinger Bands

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rjcabernet 4 posts msg #91442 - Ignore rjcabernet	4/20/2010 4:53:22 PM I there a way one can find a trend change based on the close crossing above the upper bollinger band or a close crossing below the lower bollinger band. A close crossing above the upper bollinger would indicate a bullish trend signal. A bearish trend would signal when the closed crossed below the lower bollinger band. This is only a signal if it is the first such cross since the prior trend signal. The prior trend signal can be a day ago or months ago. In other words just because there is a close that crosses above or below the appropriate bollinger band does not signal a start of a trend. The close can cross many times back and forth on the corresponding band while in the trend. Thanks, RJ
four 5,087 posts msg #91462 - Ignore four	4/20/2010 10:32:37 PM Fetcher[ high crossed above the upper bollinger band (9) set{cross, cwma(upper bollinger band (9),20) crossed above upper bollinger band (9)} draw cross draw cwma(upper bollinger band (9),20) volume > 1000000 Average Volume(30) > 250000 close between 5 and 10 chart-length is 4 months ]
chetron 2,817 posts msg #91474 - Ignore chetron modified	4/21/2010 6:55:04 AM VERY NICE, FOUR. MAYBE... Fetcher[ high crossed above the upper bollinger band (9) set{VDN, COUNT(cwma(upper bollinger band (9),20) above upper bollinger band (9),1)} set{VUP, COUNT(cwma(upper bollinger band (9),20) BELOW UPPER bollinger band (9),1)} draw VDN ON PLOT VUP draw cwma(upper bollinger band (9),20) volume > 1000000 Average Volume(30) > 250000 close between 5 and 10 chart-length is 4 months ]
chetron 2,817 posts msg #91475 - Ignore chetron	4/21/2010 7:12:50 AM BUT THE SHORT ANSWER WOULD BE, IF YOU WANT TO INDENTIFY A TREND, USE A TREND INDICATOR, MOVING AVERAGES, AND NOT A VOLITILITY INDICATOR. HTH
rjcabernet 4 posts msg #91485 - Ignore rjcabernet modified	4/21/2010 1:44:53 PM Thanks for the replies. I misstated a trend for what I am really looking for, which is a momentum breakout using the bollinger bands. I am using Bollingers Bands with a period of 10 and a deviation of .8 IE: upper bollinger band(10,.8) or lower bollinger band(10,.8). I tried using the filter you supplied with the above parameters and did not get the results I was looking for. If you click on the following link you may get a better picture of what my intent is. This is a chart showing where the momentum begins and ends. http://www.carterbillings.com/momentum.jpg Thanks again for you help
chetron 2,817 posts msg #91488 - Ignore chetron	4/21/2010 2:51:04 PM isn't that the woodie bb play thingy?????????????
rjcabernet 4 posts msg #91492 - Ignore rjcabernet	4/21/2010 3:39:52 PM I got it from First Wave - David Elliott http://groups.google.com/group/firstwave-beginners I don't think it can be done in SF without a filter that can set flags based on an event in the past using an "if" command.
chetron 2,817 posts msg #91496 - Ignore chetron modified	4/21/2010 5:14:23 PM can't be done, shirley,you jest....... Fetcher[ set{vbuy,count(close crossed above Upper Bollinger Band(10,0.8),1)} set{vshort,count(close crossed below Lower Bollinger Band(10,0.8),1)} set{var1,days(close crossed above Upper Bollinger Band(10,0.8),100)} set{var2,days(close crossed below Lower Bollinger Band(10,0.8),100)} set{vmomodn,var1 - var2} set{vmomoup,var2 - var1} draw vmomodn on plot vmomoup set{vplays,vbuy + vshort} draw bollinger(10,0.8) draw vshort on plot vbuy add column vshort add column vbuy vplays above .5 do not draw vplays close above .1 volume above 1000000 ] with jp tweaks.... Fetcher[ /* jp influences / set{vbuy,count(close crossed above Upper Bollinger Band(40,0.4),1)} set{vshort,count(close crossed below Lower Bollinger Band(40,0.4),1)} set{var1,days(close crossed above Upper Bollinger Band(40,0.4),100)} set{var2,days(close crossed below Lower Bollinger Band(40,0.4),100)} set{vmomodn,var1 - var2} set{vmomoup,var2 - var1} draw vmomodn on plot vmomoup set{vplays,vbuy + vshort} draw bollinger(40,0.4) draw vshort on plot vbuy draw ema(100) add column vshort add column vbuy vplays above .5 do not draw vplays close above .1 volume above 1000000 ] all together... Fetcher[ / all mixed up / set{vbuy1,count(close crossed above Upper Bollinger Band(40,0.4),1)} set{vshort1,count(close crossed below Lower Bollinger Band(40,0.4),1)} set{var11,days(close crossed above Upper Bollinger Band(40,0.4),100)} set{var12,days(close crossed below Lower Bollinger Band(40,0.4),100)} set{vmomodn1,var11 - var12} set{vmomoup1,var12 - var11} draw vmomodn1 on plot vmomoup1 set{vplays1,vbuy1 + vshort1} draw bollinger(40,0.4) draw vshort1 on plot vbuy1 add column vshort1 add column vbuy1 ****************** set{vbuy,count(close crossed above Upper Bollinger Band(10,0.8),1)} set{vshort,count(close crossed below Lower Bollinger Band(10,0.8),1)} set{var1,days(close crossed above Upper Bollinger Band(10,0.8),100)} set{var2,days(close crossed below Lower Bollinger Band(10,0.8),100)} set{vmomodn,var1 - var2} set{vmomoup,var2 - var1} draw vmomodn on plot vmomoup set{vplays2,vbuy + vshort} set{vplays,vplays2 + vplays1} draw bollinger(10,0.8) draw vshort on plot vbuy add column vshort add column vbuy vplays above .5 do not draw vplays close above .1 volume above 1000000 ]
four 5,087 posts msg #91497 - Ignore four	4/21/2010 5:18:50 PM @chetron thanks for the "very nice".
chetron 2,817 posts msg #91498 - Ignore chetron	4/21/2010 5:22:29 PM @ four, i like to see new looks, and angles posted in the forums.

StockFetcher Forums · General Discussion · How can I create a filter to find a trend using Bollinger Bands

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