2. Candles - Algo trading from scratch with Python — Transcript

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1. 0:01[Music]
2. 0:02let's talk about candles why and how we
3. 0:05can import them
4. 0:06backlisting records data so if i sort
5. 0:08this practice without importing data
6. 0:10first it should fail
7. 0:14the error is pretty clear it's telling
8. 0:16me no candle for binance but soul usat
9. 0:18is present in my database so let's start
10. 0:20importing the needed candles to do that
11. 0:22open the import candles page
12. 0:24choose the exchange
13. 0:26the
14. 0:28symbol and the starting date
15. 0:32notice that i entered the same starting
16. 0:34date as my backtest was
17. 0:37the ending date is not required because
18. 0:39it always assumes the current date
19. 0:42notice that there is no option for the
20. 0:43time frame either that is because jesse
21. 0:45only records the one minute timeframe
22. 0:47data and generates the rest of the time
23. 0:49frames from them let's start the
24. 0:51importing process
25. 0:53this should take a while so i'll skip
26. 0:55the video
27. 0:56let's run the backers again
28. 0:58this time it fails again that's because
29. 1:00the starting date of the backtest is
30. 1:02exactly the date that we use for
31. 1:04importing candles which means we forgot
32. 1:06to consider the warm-up candles
33. 1:12warmer candles are the data that is
34. 1:14loaded before starting the back
35. 1:16decisions let's say in your strategy
36. 1:18you're using a moving average with a
37. 1:20period of 50. warm-up candles allow you
38. 1:22to have access to that value since the
39. 1:24beginning of the practice instead of
40. 1:26just waiting 50 candles just so you can
41. 1:28estimate the value of the moving average
42. 1:30by default the warm-up period value is
43. 1:32set to 210. you can change it from
44. 1:35within the settings page if you needed
45. 1:36to
46. 1:37my backtest is using the minute time
47. 1:39frame so 210 multiplied by 5 equals 1050
48. 1:43minutes which is slightly shorter than a
49. 1:45day so if i import candles from just one
50. 1:47day earlier it should do it
51. 1:49this time we should go way faster
52. 1:51because we only need candles for one day
53. 1:53so jesse will skip the days that it
54. 1:55already has now if i run the back test
55. 1:57again it should work just fine
56. 1:59and the reason new trades were executed
57. 2:01here is because the strategy i'm using
58. 2:03is empty however an easier way to deal
59. 2:06with volume candles is to simply import
60. 2:08candles since a few years ago so you
61. 2:10don't have to worry about candles during
62. 2:12development at all
63. 2:19in case your database is empty and you
64. 2:21want to import candles as fast as
65. 2:23possible you can do that by opening
66. 2:25multiple tabs for instance while this
67. 2:28session is importing candles i can open
68. 2:30a new tab and import other candles
69. 2:34however even though jesse allows you to
70. 2:36it's best not to import simultaneously
71. 2:39from the same exchange because you might
72. 2:41hit the rate limit of the exchange and
73. 2:42get banned for a while instead you could
74. 2:44import from another exchange for example
75. 2:47in this case instead of binance spot i
76. 2:49could import from binance perpetual
77. 2:50features
78. 2:54i have to mention that importing handles
79. 2:56is not required for live trading in live
80. 2:58trading at the beginning of the live
81. 3:00session jesse will automatically import
82. 3:02the required candles for you in the next
83. 3:03video we're gonna talk about how
84. 3:05strategies work in jets