{"id":102,"date":"2007-05-06T04:49:20","date_gmt":"2007-05-06T04:49:20","guid":{"rendered":"http:\/\/www.amibroker.org\/userkb\/2007\/05\/06\/bar-magnifier\/"},"modified":"2007-07-07T19:36:43","modified_gmt":"2007-07-07T19:36:43","slug":"bar-scaling-tool","status":"publish","type":"post","link":"http:\/\/www.amibroker.org\/editable_userkb\/2007\/05\/06\/bar-scaling-tool\/","title":{"rendered":"Bar-Scaling Tool"},"content":{"rendered":"<p>When testing short-term trading systems that respond to single-bar price changes it is very convenient to be able to manually change a bar&#8217;s price and force a signal. The small program listed below can be prefixed to your system&#8217;s code and will do this by magnifying the selected High, Low and Close price with respect to the Open price of the bar.<\/p>\n<pre><span style=\"color: #0000BB\">SetBarsRequired<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">100000<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">10000<\/span><span style=\"color: #000000\">);\r<\/span><span style=\"color: #0000BB\">BI<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">BarIndex<\/span><span style=\"color: #000000\">();\r<\/span><span style=\"color: #0000BB\">SB<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">LastValue<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">ValueWhen<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">BI<\/span><span style=\"color: #000000\">==<\/span><span style=\"color: #0000BB\">SelectedValue<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">BI<\/span><span style=\"color: #000000\">),<\/span><span style=\"color: #0000BB\">BI<\/span><span style=\"color: #000000\">));\r<\/span><span style=\"color: #0000BB\">EnableScaling<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">ParamToggle<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #DD0000\">&quot;Bar&nbsp;Scaling&quot;<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #DD0000\">&quot;DISABLED|ENABLED&quot;<\/span><span style=\"color: #000000\">);\r<\/span><span style=\"color: #0000BB\">ScalingFactor<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">Param<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #DD0000\">&quot;HLC&nbsp;Scaling&nbsp;Factor&quot;<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">1<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">0<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">5<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">0.01<\/span><span style=\"color: #000000\">);\rif(<\/span><span style=\"color: #0000BB\">EnableScaling<\/span><span style=\"color: #000000\">)\r{\r<\/span><span style=\"color: #0000BB\">Hd<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">H<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]-<\/span><span style=\"color: #0000BB\">O<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">];\r<\/span><span style=\"color: #0000BB\">Ld<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">O<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]-<\/span><span style=\"color: #0000BB\">L<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">];\r<\/span><span style=\"color: #0000BB\">Cd<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">C<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]-<\/span><span style=\"color: #0000BB\">O<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">];\r<\/span><span style=\"color: #0000BB\">Hd<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">ScalingFactor<\/span><span style=\"color: #000000\">*<\/span><span style=\"color: #0000BB\">Hd<\/span><span style=\"color: #000000\">;\r<\/span><span style=\"color: #0000BB\">Ld<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">ScalingFactor<\/span><span style=\"color: #000000\">*<\/span><span style=\"color: #0000BB\">Ld<\/span><span style=\"color: #000000\">;\r<\/span><span style=\"color: #0000BB\">Cd<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">ScalingFactor<\/span><span style=\"color: #000000\">*<\/span><span style=\"color: #0000BB\">Cd<\/span><span style=\"color: #000000\">;\r<\/span><span style=\"color: #0000BB\">H<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]=<\/span><span style=\"color: #0000BB\">O<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]+<\/span><span style=\"color: #0000BB\">Hd<\/span><span style=\"color: #000000\">;\r<\/span><span style=\"color: #0000BB\">L<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]=<\/span><span style=\"color: #0000BB\">O<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]-<\/span><span style=\"color: #0000BB\">Ld<\/span><span style=\"color: #000000\">;\r<\/span><span style=\"color: #0000BB\">C<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]=<\/span><span style=\"color: #0000BB\">O<\/span><span style=\"color: #000000\">[<\/span><span style=\"color: #0000BB\">sb<\/span><span style=\"color: #000000\">]+<\/span><span style=\"color: #0000BB\">Cd<\/span><span style=\"color: #000000\">;\r}\r<\/span><span style=\"color: #007000\">\/\/Code&nbsp;to&nbsp;demonstrate&nbsp;bar&nbsp;scaling\r<\/span><span style=\"color: #0000BB\">Short<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">Cover<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">0<\/span><span style=\"color: #000000\">;\r<\/span><span style=\"color: #0000BB\">Buy<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">Cross<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">High<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">Ref<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">H<\/span><span style=\"color: #000000\">,-<\/span><span style=\"color: #0000BB\">1<\/span><span style=\"color: #000000\">));\r<\/span><span style=\"color: #0000BB\">Sell<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">Cross<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">Ref<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">L<\/span><span style=\"color: #000000\">,-<\/span><span style=\"color: #0000BB\">1<\/span><span style=\"color: #000000\">),<\/span><span style=\"color: #0000BB\">L<\/span><span style=\"color: #000000\">);\r<\/span><span style=\"color: #0000BB\">BuyPrice<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">Ref<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">H<\/span><span style=\"color: #000000\">,-<\/span><span style=\"color: #0000BB\">1<\/span><span style=\"color: #000000\">);\r<\/span><span style=\"color: #0000BB\">SellPrice<\/span><span style=\"color: #000000\">=<\/span><span style=\"color: #0000BB\">Ref<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">L<\/span><span style=\"color: #000000\">,-<\/span><span style=\"color: #0000BB\">1<\/span><span style=\"color: #000000\">);\r<\/span><span style=\"color: #0000BB\">Plot<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">C<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #DD0000\">&quot;&quot;<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">1<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">128<\/span><span style=\"color: #000000\">);\r<\/span><span style=\"color: #0000BB\">PlotShapes<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">IIf<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">Buy<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">shapeUpTriangle<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">shapeNone<\/span><span style=\"color: #000000\">),<\/span><span style=\"color: #0000BB\">colorBrightGreen<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">0<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">BuyPrice<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">0<\/span><span style=\"color: #000000\">);\r<\/span><span style=\"color: #0000BB\">PlotShapes<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">IIf<\/span><span style=\"color: #000000\">(<\/span><span style=\"color: #0000BB\">Sell<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">shapeDownTriangle<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">shapeNone<\/span><span style=\"color: #000000\">),<\/span><span style=\"color: #0000BB\">colorRed<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">0<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">SellPrice<\/span><span style=\"color: #000000\">,<\/span><span style=\"color: #0000BB\">0<\/span><span style=\"color: #000000\">);<\/span><\/pre>\n<p>Edited by Al Venosa<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When testing short-term trading systems that respond to single-bar price changes it is very convenient to be able to manually change a bar&#8217;s price and force a signal. The small program listed below can be prefixed to your system&#8217;s code and will do this by magnifying the selected High, Low and Close price with respect [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[63],"tags":[],"_links":{"self":[{"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/posts\/102"}],"collection":[{"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/comments?post=102"}],"version-history":[{"count":0,"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/posts\/102\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/media?parent=102"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/categories?post=102"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.amibroker.org\/editable_userkb\/wp-json\/wp\/v2\/tags?post=102"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}