DOC: add ta_lib troubleshooting

appendix.html

@@ -1035,16 +1035,22 @@ orders for this asset.</p>
 
 <dl class="function">
 <dt id="catalyst.api.cancel_order">
-<code class="descclassname">catalyst.api.</code><code class="descname">cancel_order</code><span class="sig-paren">(</span><em>self</em>, <em>order_param</em>, <em>exchange_name</em><span class="sig-paren">)</span><a class="headerlink" href="#catalyst.api.cancel_order" title="Permalink to this definition">¶</a></dt>
+<code class="descclassname">catalyst.api.</code><code class="descname">cancel_order</code><span class="sig-paren">(</span><em>self</em>, <em>order_param</em>, <em>exchange_name</em>, <em>symbol=None</em>, <em>params={}</em><span class="sig-paren">)</span><a class="headerlink" href="#catalyst.api.cancel_order" title="Permalink to this definition">¶</a></dt>
 <dd><p>Cancel an open order.</p>
 <table class="docutils field-list" frame="void" rules="none">
 <col class="field-name" />
 <col class="field-body" />
 <tbody valign="top">
 <tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><p class="first"><strong>order_param</strong> : str or Order</p>
-<blockquote class="last">
+<blockquote>
 <div><p>The order_id or order object to cancel.</p>
 </div></blockquote>
+<p><strong>exchange_name: name of exchange from</strong></p>
+<blockquote>
+<div><p>which you want to cancel the order</p>
+</div></blockquote>
+<p><strong>symbol:</strong></p>
+<p class="last"><strong>params:</strong></p>
 </td>
 </tr>
 </tbody>
@@ -1879,7 +1885,7 @@ Assets.</p>
 
 <dl class="class">
 <dt id="catalyst.utils.calendars.TradingCalendar">
-<em class="property">class </em><code class="descclassname">catalyst.utils.calendars.</code><code class="descname">TradingCalendar</code><span class="sig-paren">(</span><em>start=Timestamp('1990-01-01 00:00:00+0000'</em>, <em>tz='UTC')</em>, <em>end=Timestamp('2019-02-23 05:15:46.080641+0000'</em>, <em>tz='UTC')</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/catalyst/utils/calendars/trading_calendar.html#TradingCalendar"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#catalyst.utils.calendars.TradingCalendar" title="Permalink to this definition">¶</a></dt>
+<em class="property">class </em><code class="descclassname">catalyst.utils.calendars.</code><code class="descname">TradingCalendar</code><span class="sig-paren">(</span><em>start=Timestamp('1990-01-01 00:00:00+0000'</em>, <em>tz='UTC')</em>, <em>end=Timestamp('2019-03-14 06:21:07.381645+0000'</em>, <em>tz='UTC')</em><span class="sig-paren">)</span><a class="reference internal" href="_modules/catalyst/utils/calendars/trading_calendar.html#TradingCalendar"><span class="viewcode-link">[source]</span></a><a class="headerlink" href="#catalyst.utils.calendars.TradingCalendar" title="Permalink to this definition">¶</a></dt>
 <dd><p>An TradingCalendar represents the timing information of a single market
 exchange.</p>
 <p>The timing information is made up of two parts: sessions, and opens/closes.</p>

example-algos.html

@@ -1205,7 +1205,7 @@ in writting the following article:
         <span class="c1"># Define portfolio optimization parameters</span>
         <span class="n">n_portfolios</span> <span class="o">=</span> <span class="mi">50000</span>
         <span class="n">results_array</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">zeros</span><span class="p">((</span><span class="mi">3</span> <span class="o">+</span> <span class="n">context</span><span class="o">.</span><span class="n">nassets</span><span class="p">,</span> <span class="n">n_portfolios</span><span class="p">))</span>
-        <span class="k">for</span> <span class="n">p</span> <span class="ow">in</span> <span class="nb">xrange</span><span class="p">(</span><span class="n">n_portfolios</span><span class="p">):</span>
+        <span class="k">for</span> <span class="n">p</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">n_portfolios</span><span class="p">):</span>
             <span class="n">weights</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">random</span><span class="o">.</span><span class="n">random</span><span class="p">(</span><span class="n">context</span><span class="o">.</span><span class="n">nassets</span><span class="p">)</span>
             <span class="n">weights</span> <span class="o">/=</span> <span class="n">np</span><span class="o">.</span><span class="n">sum</span><span class="p">(</span><span class="n">weights</span><span class="p">)</span>
             <span class="n">w</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">asmatrix</span><span class="p">(</span><span class="n">weights</span><span class="p">)</span>

install.html

@@ -297,10 +297,21 @@ step #2:</p>
 </div>
 </li>
 <li><p class="first">Create the environment:</p>
+<p>for python 2.7:</p>
 <div class="highlight-bash"><div class="highlight"><pre><span></span>conda create --name catalyst <span class="nv">python</span><span class="o">=</span><span class="m">2</span>.7 scipy zlib
 </pre></div>
 </div>
 </li>
+</ol>
+<blockquote>
+<div><p>or for python 3.6:</p>
+<blockquote>
+<div><div class="highlight-bash"><div class="highlight"><pre><span></span>conda create --name catalyst <span class="nv">python</span><span class="o">=</span><span class="m">2</span>.7 scipy zlib
+</pre></div>
+</div>
+</div></blockquote>
+</div></blockquote>
+<ol class="arabic" start="3">
 <li><p class="first">Activate the environment:</p>
 <p><strong>Linux or MacOS:</strong></p>
 <div class="highlight-bash"><div class="highlight"><pre><span></span><span class="nb">source</span> activate catalyst
@@ -442,6 +453,14 @@ In Ubuntu, you would need to run:</p>
 </div>
 </dd>
 </dl>
+<hr class="docutils" />
+<dl class="docutils">
+<dt><strong>Issue</strong>:</dt>
+<dd>Missing TA_Lib</dd>
+<dt><strong>Solution</strong>:</dt>
+<dd>Follow <a class="reference external" href="https://mrjbq7.github.io/ta-lib/install.html">these instructions</a> to install the TA_Lib Python wrapper
+(and if needed, its underlying C library as well).</dd>
+</dl>
 </div>
 </div>
 <div class="section" id="installing-with-pipenv">