The system have five high-risk portfolios each with $12500 USD

Generally, low-risk investments have a higher level of security for investor but, tend to have a lower return.
High-risk investments, on the other hand, can bring a higher return, but with a much higher degree of uncertainty, which may cause heavy losses to investors.


Portfolios

S&P 500 Timing uses SSO (ProShares Ultra S&P 500 ETF) and SDS (ProShares UltraShort S&P 500 ETF).
Nasdaq Timing uses QLD (ProShares Ultra QQQ ETF) and QID (ProShares UltraShort QQQ ETF).
OIL Timing uses UCO (ProShares Ultra DJ-AIG CRUDE OIL ETF) and SCO (ProShares UltraShort DJ-AIG CRUDE OIL ETF).
Silver Timing uses AGQ (ProShares Ultra Silver ETF) and ZSL (ProShares UltraShort Silver ETF).
Gold Timing uses UGL (ProShares Ultra Gold ETF) and GLL (ProShares UltraShort Gold ETF).

The trading commissions are $ 7.50 USD.

Rule:
All entries and exits must be written first in forum and are limited to the next opening, so every business can be seen before materialize.
In practice, this rule makes the results are seen always rounded by default, which endows them complete validity and realism.