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    <p>This doesn't really sound like several days of work :p unless I'm missing something.</p> <pre><code># returns array of percentage gain per period def percentage_gain(array) initial = array[0] after = 0 percentage_gain = [] 1.upto(array.size-1).each do |i| after = array[i] percentage_gain &lt;&lt; (after - initial)/initial*100 initial = after end percentage_gain end # returns array of amount gain $ per period def amount_gain(array) initial = array[0] after = 0 amount_gain = [] 1.upto(array.size-1).each do |i| after = array[i] percentage_gain &lt;&lt; (after - initial) initial = after end amount_gain end # returns the maximum amount gain found in the array def max_amount_gain(array) amount_gain(array).max end # returns the maximum percentage gain found in the array def max_percentage_gain(array) percentage_gain(array).max end # returns the maximum potential gain you could've made by shortselling constantly. # i am basically adding up the amount gained when you would've hit profit. # on days the stock loses value, i don't add them. def max_potential_amount_gain(array) initial = array[0] after = 0 max_potential_gain = 0 1.upto(array.size-1).each do |i| after = array[i] if after - initial &gt; 0 max_potential_gain += after - initial end initial = after end amount_gain end array = [15.42, 16.42, 17.36, 16.22, 14.72, 13.95, 14.73, 13.76, 12.88, 13.51, 12.67, 11.11, 10.04, 10.38, 10.14, 7.72, 7.46, 9.41, 11.39, 9.7, 12.67, 18.42, 18.44, 18.03, 17.48, 19.6, 19.57, 18.48, 17.36, 18.03, 18.1, 19.07, 21.02, 20.77, 19.92, 18.71, 20.29, 22.36, 22.38, 22.39, 22.94, 23.5, 21.66, 22.06, 21.07, 19.86, 19.49, 18.79, 18.16, 17.24, 17.74, 18.41, 17.56, 17.24, 16.04, 16.05, 15.4, 15.77, 15.68, 16.29, 15.23, 14.51, 14.05, 13.28, 13.49, 13.12, 14.33, 13.67, 13.13, 12.45, 12.48, 11.58, 11.52, 11.2, 10.46, 12.24, 11.62, 11.43, 10.96, 10.63, 10.19, 10.03, 9.7, 9.64, 9.16, 8.96, 8.49, 8.16, 8.0, 7.86, 8.08, 8.02, 7.67, 8.07, 8.37, 8.35, 8.82, 8.58, 8.47, 8.42, 7.92, 7.77, 7.79, 7.6, 7.18, 7.44, 7.74, 7.47, 7.63, 7.21, 7.06, 6.9, 6.84, 6.96, 6.93, 6.49, 6.38, 6.69, 6.49, 6.76] </code></pre>
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    1. POHow can one analyze the greatest percentage gain (burst) of numbers in sequence in an array?
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    1. USJason Kim
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      1. VTUpMod
    1. COseems we think alike even if we don't speek the same language :)
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      1. USKwariz
    2. COyes, you are obviously a c programmer haha
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      1. USJason Kim
    3. COyes ;) edited my post on the typo 0based/1 based ...
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      1. USKwariz
 

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