Placing multiple orders with limited capital

How to place multiple orders only when with enough money?
Say I need to order 4 different pairs in the order of: EUR/USD, EUR/JPY, GBP/USD, USD/CHF.
Is there a way to check is I have enough money before opening the first order?
It has to be all 4 pairs or nothing.

Money needed should be equal to the sum of the margin required to place all 4 orders. (Note: 1 lot in MT4 = 100,000 units in Oanda).

The calculation is straightforward.

Margin Required in USD = Price of Base Currency in USD * Volume * 1/Leverage

Assuming that your broker is offering 100:1 leverage (so the margin required will be 1% of trade volume) and you intend to open 1.0 lot positions on each currency pair, with the current prices (11:00 GMT, 13 Sep 2016), the margin required for each currency will be:

1. EURUSD: 1.12252 * 100,000 * 1% = USD 1,122.52
2. EURJPY (Same as EURUSD) = USD 1,122.52
3. GBPUSD: 1.31989 * 100,000 * 1% = USD 1,319.89
4. USDCHF = USD 100,000 * 1% = USD 1,000.00

So the minumum equity required for opening 1.0 lots on all pairs is USD 4,564.91

But if you have just enough equity to cover these trades, opening 4.0 lots would be suicidal.