number problem

[Shahmadhur13]

This code is perfectly working without any error and with required result in Pycharm IDE, PYTHON 3.8
I'm student of medical/dentistry field and started my computer program learning since 3 weeks so i know only python, nothing else in programming.
I took your this thread problem as a just one of python exercise to learn more about python.
I think you made some copy/pasting error, sometimes pasting may distort indentation in code and gives error.
I hope you read code line by line from bottom to top after pasting.
Thank you for your feedback anyways.

here is final solution.
I have added few more code line to my previous post to arrive at solution.

sequence = True
all_entered_numbers = [0]
win_list = []
loss_list = []
high_num = 0
low_num = 0
loss = []

while sequence:
    current_num = int(input("enter a number: "))
    if current_num >= 0:
        all_entered_numbers.append(current_num)
        prev_num = all_entered_numbers[-2]
        if current_num > prev_num:
            win_list.append(current_num)
            loss_list.append(0)
            high_num = current_num
            loss.append(0)
        elif current_num < prev_num:
            loss_list.append(current_num)
            win_list.append(0)
            low_num = current_num
            loss.append(high_num - low_num)
        else:
            pass
    else:
        sequence = False

print(f"all entry are : {all_entered_numbers}")
print(f"winning list is : {win_list}")
print(f"losing list is : {loss_list}")
print(f"loss occurence is : {loss}")

all_instances = []  # makes nested list of loss occurence
for i in loss:
    if i == 0:
        all_instances.append([])
    else:
        all_instances[-1].append(i)
loss_instances = list(filter(None, all_instances))  # removing zero values
print(f'loss instance = {loss_instances}')
longest = [len(i) for i in loss_instances]  # to find out longest sequel of loss
most_loss = loss_instances[longest.index(max(longest))][-1]
print(f"Most loss is : {most_loss}")
print(most_loss)

Output:
enter a number: 3
enter a number: 6
enter a number: 36
enter a number: 32
enter a number: 32
enter a number: 121
enter a number: 66
enter a number: 24
enter a number: 22
enter a number: 371
enter a number: 661
enter a number: 6
enter a number: 4
enter a number: 8
enter a number: -1
all entry are : [0, 3, 6, 36, 32, 32, 121, 66, 24, 22, 371, 661, 6, 4, 8]
winning list is : [3, 6, 36, 0, 121, 0, 0, 0, 371, 661, 0, 0, 8]
losing list is : [0, 0, 0, 32, 0, 66, 24, 22, 0, 0, 6, 4, 0]
loss occurence is : [0, 0, 0, 4, 0, 55, 97, 99, 0, 0, 655, 657, 0]
loss instance = [[4], [55, 97, 99], [655, 657]]
Most loss is : 99
99

you can remove some print function lines to remove extra output. I kept to figure out what is happenning at those lines.