Deposit is the sum of balances in both currencies.
deposit = currency1 + (currency2 * price)

Perhaps here there is an answer FAQ_RU#24

To understand the real reason, you need a detailed log (LOG=true, LOG_DEBUG=true) and config

Ok thanks with this option, it's more clear :) Bot is working now !
Do you advise a strategy ?Since 1 Day with Scaper, I have lost 12$, but with BB Strategy, I have earned 1,45$ with 100$. Maybe it's my config that gone wrong. Any tips ?

The scalper is used only for the flat!
Now the market is trend.
BB is a very difficult strategy to use it, you need to understand how the indicators work and how to configure them

Use the strategies of "One Sell a lot Buy" or "One Buy a lot Sell"

Example of setting for "One Sell a Lot Buy". To work we need USD
Change the options for you.

EXCHANGE=wex
NAME_COIN=btc
NAME_COIN_TWO=usd
COUNT_ORDERS=20
QUANTITY_ORDERS_IN_BLOCKS=5
SIZE_ORDERS_MARTINGALE=20
OFFSET_FIRST_ORDERS_PERCENT=0.01
RANGE_OFFSET=15
ONE_ORDERS_SELL=true
ONE_ORDERS_OFFSET=0.4
ONE_ORDERS_PROFIT_PERCENT=0.3

It will be something like this.
Screen from another stock exchange. Just to make it clear the essence of the strategy.

Okay man, THANKS !!!