Expert Advisor with matematical order

Strategy:
It starts with orders pending above and below the price of X pip spaced between them, inserted on rounded price levels. When the price touches one of the two levels the x-grid is formed at a time
On each level at a distance of x pip open a buy and sell, divided into stop orders and limit orders,
orders size will be calculated according to the trend in which it is located
FLAT, LONG, SHORT

in SHORT trend, the SELL stop always has the largest size
BUY limit is not entered
BUY STOPs have small size
SELL small size limit, when it becomes SELL and the price goes above and reaches the next grid level up, place order for sell stop difference on the same level

in LONG trend, the buy stop always has the largest size
sell limit is not entered
the sell stop they have small size
small buy limit size but when it comes to buy and the price drops and reaches the next grid level below it is placed order for difference buy stop on the same level

when a level is already occupied by an order of the same size and type the order will be placed at the next higher or lower level up to a maximum of x levels