Q1 Import Tesla for the last ten months.

Hint: Revise the given code below.

## # A tibble: 209 x 8
##    symbol date        open  high   low close   volume adjusted
##    <chr>  <date>     <dbl> <dbl> <dbl> <dbl>    <dbl>    <dbl>
##  1 TSLA   2019-06-14  211.  217.  210.  215.  7433400     215.
##  2 TSLA   2019-06-17  215.  227   214.  225. 12316800     225.
##  3 TSLA   2019-06-18  229.  235.  223.  225. 12715800     225.
##  4 TSLA   2019-06-19  225.  228.  221.  226.  6575100     226.
##  5 TSLA   2019-06-20  223   227.  216.  220. 11863500     220.
##  6 TSLA   2019-06-21  216.  222.  216.  222.  8202100     222.
##  7 TSLA   2019-06-24  223.  226.  221.  224.  5750800     224.
##  8 TSLA   2019-06-25  224.  225.  219.  220.  6182100     220.
##  9 TSLA   2019-06-26  220.  227.  218.  219.  8507200     219.
## 10 TSLA   2019-06-27  219.  223.  217.  223.  6339700     223.
## # … with 199 more rows

Q2 Calculate 15-day and 50-day simple moving averages.

Hint: Rename 15-day moving average to SMA.short and 50-day moving average to SMA.long.

## # A tibble: 209 x 10
##    symbol date        open  high   low close  volume adjusted SMA.short SMA.long
##    <chr>  <date>     <dbl> <dbl> <dbl> <dbl>   <dbl>    <dbl>     <dbl>    <dbl>
##  1 TSLA   2019-06-14  211.  217.  210.  215.  7.43e6     215.        NA       NA
##  2 TSLA   2019-06-17  215.  227   214.  225.  1.23e7     225.        NA       NA
##  3 TSLA   2019-06-18  229.  235.  223.  225.  1.27e7     225.        NA       NA
##  4 TSLA   2019-06-19  225.  228.  221.  226.  6.58e6     226.        NA       NA
##  5 TSLA   2019-06-20  223   227.  216.  220.  1.19e7     220.        NA       NA
##  6 TSLA   2019-06-21  216.  222.  216.  222.  8.20e6     222.        NA       NA
##  7 TSLA   2019-06-24  223.  226.  221.  224.  5.75e6     224.        NA       NA
##  8 TSLA   2019-06-25  224.  225.  219.  220.  6.18e6     220.        NA       NA
##  9 TSLA   2019-06-26  220.  227.  218.  219.  8.51e6     219.        NA       NA
## 10 TSLA   2019-06-27  219.  223.  217.  223.  6.34e6     223.        NA       NA
## # … with 199 more rows

Q3 Transform data to long form from wide form for graphing.

Hint: Select date, close, SMA.short, and SMA.long. Then, tranform the data to long from so that you could have all three variables (close, SMA.short, and SMA.long) in one graph.

## # A tibble: 627 x 3
##    date       type  price
##    <date>     <chr> <dbl>
##  1 2019-06-14 close  215.
##  2 2019-06-17 close  225.
##  3 2019-06-18 close  225.
##  4 2019-06-19 close  226.
##  5 2019-06-20 close  220.
##  6 2019-06-21 close  222.
##  7 2019-06-24 close  224.
##  8 2019-06-25 close  220.
##  9 2019-06-26 close  219.
## 10 2019-06-27 close  223.
## # … with 617 more rows

Q4 Visualize data.

Hint: Map date to the x-axis and stock prices (close, SMA.short, and SMA.long) to the y-axis.

Q5 If you had invested $1 million on the day of the first bullish crossover and sold your shares on the following bearish crosover, how much would you have won or lost?

Hint: Elaborate your calculation.

You would buy 1 million dollars worth of stock right before October for around 225 dollars for a total of 4,444 shares. The bearish crossover comes before April and is around 370 dollars. If we sell 4,444 shares for 370 dollars we get a total of 1,644,444 dollars. With our investment of 1 million dollars we got a total amount of 644,444 dollars.

Q6 The bearish crossover missed the actual high. How long (in days) was the time lag?

Hint: Elaborate your calculation. One word/number answer is not enough.

The high of the close was on February 19th and the bearish crossover came on March 17th this was a time lag of 27 days. I calculated this by finding the high on the graph for the close and then finding the bearish crossover to find the days between.

Q7 What would you change in the moving average model to reduce the time lag?

Hint: Elaborate your answer. One word answer is not enough.

Change the amount of days to a smaller amount to get a smaller time lag.

Q7.a Create another chart below with the change, and count the reduced time lag (in days).

## # A tibble: 209 x 12
##    symbol date        open  high   low close volume adjusted SMA.short SMA.long
##    <chr>  <date>     <dbl> <dbl> <dbl> <dbl>  <dbl>    <dbl>     <dbl>    <dbl>
##  1 TSLA   2019-06-14  211.  217.  210.  215. 7.43e6     215.        NA       NA
##  2 TSLA   2019-06-17  215.  227   214.  225. 1.23e7     225.        NA       NA
##  3 TSLA   2019-06-18  229.  235.  223.  225. 1.27e7     225.        NA       NA
##  4 TSLA   2019-06-19  225.  228.  221.  226. 6.58e6     226.        NA       NA
##  5 TSLA   2019-06-20  223   227.  216.  220. 1.19e7     220.        NA       NA
##  6 TSLA   2019-06-21  216.  222.  216.  222. 8.20e6     222.        NA       NA
##  7 TSLA   2019-06-24  223.  226.  221.  224. 5.75e6     224.        NA       NA
##  8 TSLA   2019-06-25  224.  225.  219.  220. 6.18e6     220.        NA       NA
##  9 TSLA   2019-06-26  220.  227.  218.  219. 8.51e6     219.        NA       NA
## 10 TSLA   2019-06-27  219.  223.  217.  223. 6.34e6     223.        NA       NA
## # … with 199 more rows, and 2 more variables: NEWSMA.short <dbl>,
## #   NEWSMA.long <dbl>
## # A tibble: 627 x 3
##    date       type  price
##    <date>     <chr> <dbl>
##  1 2019-06-14 close  215.
##  2 2019-06-17 close  225.
##  3 2019-06-18 close  225.
##  4 2019-06-19 close  226.
##  5 2019-06-20 close  220.
##  6 2019-06-21 close  222.
##  7 2019-06-24 close  224.
##  8 2019-06-25 close  220.
##  9 2019-06-26 close  219.
## 10 2019-06-27 close  223.
## # … with 617 more rows

The high is still on February 19th but the new bearish crossover is now on February 27th for a time lag of 8 days.

Q8 Hide the messages and the code, but display results of the code from the webpage.

Hint: Use message, echo and results in the chunk options. Refer to the RMarkdown Reference Guide.

Q9 Display the title and your name correctly at the top of the webpage.

Q10 Use the correct slug.

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