Ultimate Algorithmic Trading System

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■■■disadvantages to dynamic typing and this is a subject of much controversy in theprogramming arena.Python is free and has a very large user’s group. The code is open source and free touse in commercial and personal applications as long as the copyright informationis prominently displayed. Almost any question about how to do something inPython can be answered by simply Googling it.Python is perfect for our purposes. All the trading system tracking/bookkeeping/analysis has already been programmed. All you need to do is use Python languageand the PSB tools to create the perfect mousetrap.Python has no foo bar. Most other languages use the words foo and bar as variablenames in example code snippets. Their origination is from the military acronymfubar and was probably first used at MIT. Python uses the words spam andeggs instead. The creators of Python wanted it to be fun, so they named thelanguage after Monty Python, the British comedy group. Most people wouldn’t putthe words ‘‘fun’’ and ‘‘programming’’ together, but some of us would. Spamand eggs come from Monty Python’s Flying Circus.■ Python InstallationYou will need to install Python on your computer before we can do anything. This isanother benefit of Python—it is very easy to install. Go to the website www.python.org and click on Downloads. You will be provided links for different operatingsystems. As of the writing of this chapter the latest version was 3.5. The PSB waswritten in 3.4 and is upwardly compatible. Download the installer and run it. Justclick through the prompts—the default values will be fine. This installer shouldinstall both IDLE (Python GUI) and Python (command line). If you are using aWindows operating system, a folder with the Python programs and manuals will beinstalled in your Apps screen. I use Classic Shell on my Windows 8 machine andboth applications flow to the Start menu. Of course, if you are using Windows 7, itgoes without saying you will find Python on the Start menu.■ PSB InstallationDownload the PSB.zip file from this book’s companion website (www.wiley.com/go/ultimatealgotoolbox). Unzip it to your C: drive or to another convenientlocation.169USING PYTHON TO BACKTEST YOUR ALGORITHMIDLEThe PSB was programmed exclusively with IDLE, the standard Python developmentenvironment. Its name is an acronym of ‘‘Integrated DeveLopment Environment.’’www.rasabourse.com
It works well on both Unix and Windows platforms. It includes a Python shellwindow, which gives you access to the Python interactive mode. Before we canstart looking at the PSB, we need to learn a little bit about IDLE. So go ahead andlaunch it through your Apps screen or Start menu. The Python Shell should now bein front of you. Doesn’t look that special; it’s barebones in fact. This is by design tokeep the Python learning curve as a gradual incline.A prompt, preceded by >>>, should now be blinking at you. Currently, theShell is in interactive mode—meaning that it wants you to give it a command. Type4 + 6 and hit enter. The prompt now comes back with the answer—10. Nowtype print(‘‘Hello World’’) and hit enter. The prompt comes back with HelloWorld. Now type 100 ** 0.5 and hit enter. You should get the number 10.Nowtype import this and hit enter. Your screen should be filled with the following:170USING PYTHON TO BACKTEST YOUR ALGORITHMThe Zen of Python, by Tim PetersBeautiful is better than ugly.Explicit is better than implicit.Simple is better than complex.Complex is better than complicated.Flat is better than nested.Sparse is better than dense.Readability counts.Special cases aren’t special enough to break the rules.Although practicality beats purity.Errors should never pass silently.Unless explicitly silenced.In the face of ambiguity, refuse the temptation to guess.There should be one—and preferably only one—obvious way to do it.Although that way may not be obvious at first unless you’re Dutch.Now is better than never.Although never is often better than *right* now.If the implementation is hard to explain, it’s a bad idea.If the implementation is easy to explain, it may be a good idea.Namespaces are one honking great idea—let’s do more of those!This is an ‘‘Easter egg’’ of a poem created by Python pioneer Tim Peters. Pretty cool,huh? Some people live, eat, and breathe Python. You don’t need to go overboard toget the benefits of learning a programming language such as Python.You can now see why they call it an ‘‘interactive’’ shell. Let’s switch gears anduse IDLE as an IDE. Go under the File menu and select Open … and then navigateyour way to the PSB folder and open PSBBollinger. The file that opens is a tradingalgorithm based once again on Bollinger Bands.www.rasabourse.com
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THE ULTIMATEALGORITHMICTRADING SYST
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THE ULTIMATEALGORITHMICTRADING SYST
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CONTENTSAbout the authorIntroductio
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Reproduction 238Mutation 240Using G
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ABOUT THE AUTHORIt was March of 198
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Well that was 27 years ago and I di
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xivINTRODUCTION TO THE ULTIMATE ALG
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xviINTRODUCTION TO THE ULTIMATE ALG
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CHAPTER 1Introductionto TradingAlgo
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However, at this introductory stage
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completely above the tableau. If th
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Don’t get bogged down trying to u
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checking account was down the $10K,
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Short Liquidation Condition—What
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One BarStrengthTwo BarStrengthThree
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and inexperienced trading system pr
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Input = 6StartInput = 4Input <> 6In
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The diagram in Figure 1.4 looks cle
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observed. If the latter criterion i
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Start or NewBarIs C >AVG(C,200)YesN
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CHAPTER 2Stochastics andAverages an
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The basic theory behind the ADX is
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4. Divide the 14-day smoothed plus
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if myADX < 35 thenif MarketPosition
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TABLE 2.1Performance of Directional
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FIGURE 2.4Source: TradeStationExamp
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Start orNew BarIs RSI < 30YesBuy Ma
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RSI DivergenceMarket Continuing to
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If marketPosition =-1 and close > e
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TABLE 2.3Performance of RSI Failure
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Start orNew BarIs Slow %K CrossingA
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TABLE 2.4Performance of Stochastic
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it is boundless extended readings a
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TABLE 2.5Performance of CCI algorit
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FIGURE 2.11Source: TradeStationThe
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We will discuss moving averages in
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MACDAvg = XAverage( MyMACD,9)MACDDi
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FIGURE 2.13Source: TradeStationThre
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LC0_E0B −25000 −41790 398 −62
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FIGURE 2.14Source: TradeStationA 60
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TABLE 2.8 Performance of Bollinger
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If filterTrade = false thenIf close
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Keltner ChannelChester Keltner brou
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FIGURE 2.15Source: TradeStationKelt
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35000300002500020000150001000050000
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TABLE 2.12Best Parameter Sets of Ke
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CHAPTER 3Complete TradingAlgorithms
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Box 3.1 Turtle System #1Buy one tic
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TABLE 3.1Turtle System 1 without LT
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TABLE 3.3Turtle System 1 with LTLF
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TABLE 3.4Tandem Performance of Turt
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Pause the Battle—Let’s Talk Ris
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Box 3.3 Battle Royale—And the Com
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TABLE 3.5Single Moving Average (SMA
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TABLE 3.8Donchian Channel Breakout
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we have, because who has the time t
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%Winners ShortLen InterLen StopDoll
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on a peak. This demonstrates a lack
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The correlation coefficients range
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TABLE 3.13The Best Results for the
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TABLE 3.17Results for the Donchian
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FIGURE 3.5AmiBroker’s walk-forwar
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direction of the 200-day moving ave
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range day and initially puts on two
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CHAPTER 4Introduction toAmiBroker
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Things All Programmers Need to Know
Page 133 and 134: expressions deal with a string of c
Page 135 and 136: AFL uses functions DateNum(), DateT
Page 137 and 138: to Short and Cover as well. If you
Page 139 and 140: FIGURE 4.2The AmiBroker Editor wind
Page 141 and 142: to the user. Instead of having to r
Page 143 and 144: This is where you can change the va
Page 145 and 146: shortMav = MA(C,avgLen1);longMav =
Page 147 and 148: code. This is a very difficult thin
Page 149 and 150: the order of the arrays. I admit th
Page 151 and 152: FIGURE 4.17The AFL Code Wizard ‘
Page 153 and 154: ■■■This time click on is grea
Page 155 and 156: This should look very similar to th
Page 157 and 158: before a single line of code is typ
Page 159 and 160: COND3 = C > MA(C,100);COND1 = cente
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Page 163 and 164: FIGURE 5.1trading.Once you define t
Page 165 and 166: GetDataGET DATACOMPONENTLoad Data i
Page 167 and 168: 152USING MICROSOFT EXCEL TO BACKTES
Page 169 and 170: performance of the trading system.
Page 171 and 172: 156 FIGURE 5.9 The Visual Basic Edi
Page 173 and 174: FIGURE 5.12This error message appea
Page 175 and 176: End IfIf marketPosition = -1 ThenCa
Page 177 and 178: ■■moc—Market On Close order.
Page 179 and 180: Simple Moving Average Crossover usi
Page 181 and 182: Call Trade(ExitShort, "S-ATR Prof",
Page 183: 168USING PYTHON TO BACKTEST YOUR AL
Page 187 and 188: function modules and some are a lit
Page 189 and 190: inclusive, the number of iterations
Page 191 and 192: 176This indicator is programmed as
Page 193 and 194: if prices[curBar - offset] < prices
Page 195 and 196: All these files deal with opening a
Page 197 and 198: entryPrice,fileList,entryPrice,entr
Page 199 and 200: Python has a ton of reusable code a
Page 201 and 202: 186USING PYTHON TO BACKTEST YOUR AL
Page 203 and 204: portfolioClass. These classes are n
Page 205 and 206: percent wins, number of trades, and
Page 207 and 208: >>> c = a + b>>> cAfter you hit ent
Page 209 and 210: you don’t need to know exactly ho
Page 211 and 212: Shorting occurs when the low of the
Page 213 and 214: That was the long entry logic only
Page 215 and 216: FIGURE 6.4brackets.A Python run-tim
Page 217 and 218: prevAvg2 and today’s avg1 must be
Page 219 and 220: ■ TradeStation IDE204AN INTRODUCT
Page 221 and 222: 206AN INTRODUCTION TO EASYLANGUAGEt
Page 223 and 224: FIGURE 7.5The algorithm with a sing
Page 225 and 226: the Vars statement and initialize t
Page 227 and 228: TABLE 7.1EasyLanguage Keywords and
Page 229 and 230: 214AN INTRODUCTION TO EASYLANGUAGEF
Page 231 and 232: standard deviations. In our example
Page 233 and 234: 218AN INTRODUCTION TO EASYLANGUAGEt
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into a project makes it easier to a
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If marketPosition =-1 thenbeginend;
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or program any trading idea. Practi
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CHAPTER 8Genetic Optimization,Walk
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superfast processors, searching a l
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This equation involves four unknown
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For generation = 1 To 100 ' total g
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Converting Fitness in Terms of Slic
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'the 6 darts landedRandomizeFor l =
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roulette(i) = Rnd(1#)If roulette(i)
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selection and reproduction may even
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This is just one possible solution.
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history of each market. This test w
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Crossover RateThe rate that determi
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TradeStation’s and AmiBroker’s
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TABLE 8.3In-Sample Testing TA2Le Se
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Here are the various calculations t
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1. movAvgLen { 50 to 150 by 10 incr
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TABLE 8.6The Out-of-Sample (OOS) Re
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your algorithm are each written on
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That’s it! These seven lines of c
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[Equity]350003000025000200001500010
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Calculating Start Trade Drawdown Wi
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A loop is used to flow through each
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The maximum drawdown of this algori
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■ Fixed Fractional272PORTFOLIO AN
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FIGURE 9.2Add a strategy to your st
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276FIGURE 9.6The UGTATS markets and
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278FIGURE 9.9 How to adjust the set
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FIGURE 9.12 The Trade Analysis wind
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282PORTFOLIO ANALYSISFIGURE 9.15thi
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FIGURE 9.18 Profit and drawdown are
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FIGURE 9.20 To set the portfolio st
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FIGURE 9.24Source: TradeStationThe
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count makes sense; trades are turne
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APPENDIX AAmiBrokerHere is a brief
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switchbreak (part of the switch sta
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Here is the source code from Chapte
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PctSize = PositionRisk * MarginDepo
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■ KeywordsprevMarketPositionmarke
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upSumAvg = upSum / lengthdnSumAvg =
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Sub BollingerBand(dataList, length,
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308EXCEL SYSTEM BACKTESTERIf (kVal
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■ Keywords and Identifierscurrent
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312PYTHON SYSTEM BACKTESTERdef calc
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sysMark =self.systemMarkets[i]avgLo
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class stochClass(object):class stoc
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318PYTHON SYSTEM BACKTESTERfor i in
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■ Python-Specific Keywordsandasas
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Monte Carlo Analysis# Monte Carlo A
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FIGURE D.1324TRADESTATION AND EASYL
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Simple RSI with Profit Objective an
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If condition1 and condition2 then b
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330TRADESTATION AND EASYLANGUAGEIf(
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if lastTradeLoser thenbeginif curre
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Value1 = swingHighBar(1,h,pivotHiSt
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■■■■■■■Statistically
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INDEXNote: Page references followed
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calculation2 standard deviations, u
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ES. See Exhaustive searchESB. See E
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Mini Russell day trading system, na
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PPO. See Percentage price oscillato
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Time-based market order (MOC), exit
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