Сигнал хороший; баланс рахунку низький.

In Ukrainian, the verb to be is usually omitted in the present tense.

So:

• Сигнал хороший = The signal is good
• баланс рахунку низький = the account balance is low

This is completely normal.
If you wanted past or future, then forms of бути would appear:

• Сигнал був хороший = The signal was good
• Баланс рахунку буде низький = The account balance will be low

They are adjectives and they must agree with the nouns they describe.

Here:

• сигнал is masculine singular
• баланс is masculine singular

So the adjectives also appear in the masculine singular nominative form:

• хороший
• низький

If the noun changed, the adjective would change too:

• мережа хороша = the network is good
  because мережа is feminine
• з’єднання хороше = the connection is good
  because з’єднання is neuter

Because рахунку is the genitive singular form of рахунок.

• рахунок = account / bill / invoice
• рахунку = of the account

So:

• баланс рахунку literally means balance of the account

This is a very common Ukrainian pattern: one noun followed by another noun in the genitive to show possession or relationship.

Compare:

• номер телефону = phone number
• центр міста = city center
• баланс рахунку = account balance

A helpful breakdown is:

• Сигнал — nominative singular
• хороший — nominative singular masculine adjective
• баланс — nominative singular
• рахунку — genitive singular
• низький — nominative singular masculine adjective

The two main subjects are:

• сигнал
• баланс рахунку

And the adjectives хороший and низький act like predicate adjectives: is good, is low.

Good question. Ukrainian adjectives often come before nouns when they directly describe them inside a noun phrase:

• хороший сигнал = a good signal
• низький баланс рахунку = a low account balance

But in your sentence, the structure is different:

• Сигнал хороший
• Баланс рахунку низький

Here the adjective comes after because it is functioning like the English predicate after is:

• The signal is good
• The account balance is low

So:

• хороший сигнал = good signal
• сигнал хороший = the signal is good

That difference is very important.

Yes, you could, but it would mean something slightly different in structure.

• Сигнал хороший; баланс рахунку низький
  = The signal is good; the account balance is low

• Хороший сигнал; низький баланс рахунку
  = more like two noun phrases: Good signal; low account balance

The original sentence sounds more like a full statement.
The version with adjectives first can sound more like labels, short notes, or interface text.

The semicolon links two separate but related statements:

• Сигнал хороший
• баланс рахунку низький

It works much like English semicolons do. It shows a stronger break than a comma, but the ideas are still connected.

You could also see other punctuation depending on context:

• Сигнал хороший, баланс рахунку низький.
• Сигнал хороший. Баланс рахунку низький.

The semicolon is just a neat way to keep both short statements together.

Yes, it is natural and understandable.

It literally means balance of the account, which is a standard Ukrainian way to express account balance.

Depending on context, Ukrainian might also use other phrases, such as:

• залишок на рахунку = amount remaining in the account
• баланс на рахунку = balance on the account

But баланс рахунку is perfectly normal, especially in technical, banking, or mobile-service contexts.

No. Рахунок can have several meanings depending on context, including:

• account
• bill
• invoice
• sometimes score in certain contexts

In баланс рахунку, the meaning is clearly account.

So context matters a lot with this word.

Yes, низький is a normal and correct choice.

It means low in the sense of level, amount, or degree.

So:

• низький баланс = low balance
• низький рівень сигналу = low signal level

In some contexts, Ukrainian may also use words like малий or different phrasing, but низький is very natural here.

The stress is approximately:

• сигна́л
• хоро́ший
• бала́нс
• раху́нку
• ни́зький

So you could read it as:

• сигна́л хоро́ший; бала́нс раху́нку ни́зький

That stress pattern will help you sound much more natural.

Yes, Ukrainian word order is fairly flexible, but different orders can change emphasis.

Neutral order here:

• Сигнал хороший; баланс рахунку низький.

You could also say:

• Хороший сигнал; низький баланс рахунку.
  This sounds more like brief labels or descriptions.

• Баланс рахунку низький; сигнал хороший.
  Same meaning, but the balance comes first for emphasis.

The original version is a clear, natural statement.

You usually add не before the adjective:

• Сигнал не хороший = The signal is not good
• Баланс рахунку не низький = The account balance is not low

However, in real speech, Ukrainians often prefer a more natural opposite adjective when possible:

• Сигнал поганий = The signal is bad
• Баланс рахунку високий = The account balance is high

So grammatically не + adjective works, but stylistically a direct opposite can sound better.

They are close in meaning, but not identical in structure.

• хороший сигнал = a good signal / good signal
  This is a noun phrase.

• Сигнал хороший = The signal is good
  This is a full statement.

Think of it this way:

• хороший сигнал names a thing
• сигнал хороший says something about that thing

That is why your sentence feels like a complete report or status message.