def new_fields():
"""Generates JSON s-expression for new fields.
"""
return [
{"name": "Close-1", "field": normalize_previous_close()},
{"name": "Open", "field": normalize_open()},
{"name": "Volume-1", "field": previous("Volume")},
{"name": "Bullish-1", "field": previous("Bullish")},
{"name": "Bearish-1", "field": previous("Bearish")},
{"name": "UpOrDown?", "field": ["if", [">", daily_change(), 0], "Up", "Down"]},
]
def new_fields():
"""Generates JSON s-expression for new fields.
"""
return [{
"name": "Close-1",
"field": normalize_previous_close()
}, {
"name": "Open",
"field": normalize_open()
}, {
"name": "Volume-1",
"field": previous("Volume")
}, {
"name": "Bullish-1",
"field": previous("Bullish")
}, {
"name": "Bearish-1",
"field": previous("Bearish")
}, {
"name": "UpOrDown?",
"field": ["if", [">", daily_change(), 0], "Up", "Down"]
}]
def normalize_open():
"""Price at closing of the previous day minus the price at opening
over the price at closing of the previous day.
"""
return ["/", ["-", previous("Close"), ["f", "Open"]], previous("Close")]
def normalize_previous_close():
"""Price at closing of the previous day minus the price at opening
of the previous day over the price at opening of the previous day.
"""
return ["/", ["-", previous("Close"), previous("Open")], previous("Open")]
def normalize_open():
"""Price at closing of the previous day minus the price at opening
over the price at closing of the previous day.
"""
return ["/", ["-", previous("Close"), ["f", "Open"]], previous("Close")]
def normalize_previous_close():
"""Price at closing of the previous day minus the price at opening
of the previous day over the price at opening of the previous day.
"""
return ["/", ["-", previous("Close"), previous("Open")], previous("Open")]
