problem about slope in python script for bitcoin trading

[fisher_garry]

I am trying to run this script at trality.com which is a trading site for cryptocurrencies. I am looking for a calculation for the angle of the bitcoin slope traded against ethereum. But I am not sure what the script does to calculate the angle. I get very small angles. Can someone identify why the angles are so small. I want an angle based on a time interval of 1 hour or 4 hours. And I want to buy when the angle is above 30 degrees. I dont know if it uses radians or degrees in the script. Thank you.

import numpy as np

def initialize(state):

    state.counter = 0

@schedule(interval="1h", symbol="ETHBTC")
def handler(state, data):

    angle = 0
            
    macd_ind = data.macd(12,26,9)

    if macd_ind is None:
        return

    signal = macd_ind['macd_signal']

    has_position = has_open_position(data.symbol, truncated=True)
    balance_base = float(query_balance_free(data.base))
    balance_quoted = float(query_balance_free(data.quoted))
    buy_amount = balance_quoted * 0.80 / data.close_last

    plot("signal",signal[-1],"ETHBTC")

    if state.counter < 4:
        state.counter += 1
    else:
        state.counter = 0

    if state.counter == 4:

        lastsignals = signal[-4:]

        # calculating the slope of last 4 candles
        slope = (lastsignals[-1] - lastsignals[0]) / 3
        angle = np.rad2deg(np.arctan(slope))

        print("slope: ",slope)
        print("angle: ",angle)
        plot("angle of signal",angle,"ETHBTC")

        if angle > 0.26: # 15 degrees

            print("-------")
            print("Checking for buying possibility of {}".format(data.symbol))
            print("buy amount:",buy_amount)
            print("buy price:", data.close_last)

            create_order(symbol=data.symbol,amount = buy_amount)


        elif angle < -10 and has_position:
            print("-------")
            print("Checking for selling possibility of {}".format(data.symbol))
            print("sell amount:",balance_base)
            print("sell price:",data.close_last)

            close_position(data.symbol)