[Why did the dollar and yen jump from 5:30 in the early morning?]
In Forex, margin (balance) is required to hold an ordered position. The margin maintenance rate is always calculated while a position is held, and when the margin maintenance rate falls below 100%, a forced loss cut approaches.
A forced loss cut is executed when the margin maintenance rate falls below 50%.
However, when NY time closes and the next business day is reached with a margin maintenance rate of 50% or more and less than 100%, position holders
✅ Additional margin payments
✅ Loss cut on held positions
✅ Recite sutras and pray until the compulsory loss cut execution time the next day (around 5:30 after NY time closes, although the time varies slightly depending on the securities company)
You must choose one of these three. *This is just the case with Japan FX.
In this case, I have the impression that there were many short positions before the Bank of Japan financial decision meeting. There were probably many people who expected the yen to appreciate after the Bank of Japan financial decision meeting.
As a result, the depreciation of the yen was induced, and since the momentum did not subside in US time, the dollar yen rose by about 3.5 yen.
Traders who have lost control are in a situation where their losses do not change whether they cut losses or are forced to cut losses...

Probably, instead of deceiving people who are ignorant about investments as usual, I will consider that they are targeting investors who want to make a profit by extracting information on merchant stocks (stocks used in fraud) here and taking advantage of it
In any case, it is wise not to touch suspicious Hong Kong stocks or US stocks such as LXEH