The trading strategy used is bollinger bands. (You can create bollinger bands on graphs in poloniex). The strategy is to buy when price touches lower bollinger band and sell when the price is above your bought price and also hits high bollinger band. If the price goes down and again touches lower bollinger band then invest another 25% of total investment assigned for a currency.
Bitcoin is different than any currency you’ve used before, so it’s very important to understand some key points. You can use them to send or receive any amount of money, with anyone, anywhere in the world, at very low cost. Bitcoin payments are impossible to block, and bitcoin wallets can’t be frozen. Actually, the Bitcoin network is unstoppable and un-censorable.

Why is it necessary to do this way? When you go shopping, you try to find the best prices looking for discount programs, bonus campaigns and other ways to minimize your expenses. When dealing with crypto trading, you have no need to compare prices in different places as the cost is on the chart already. All you need is to understand whether this price is suitable for you or not.

The crypto world is a uniquely perfect environment for arbitrage. As William Belk argues here, the combination of it’s distributed nature, regulation, security, availability, and anonymity factors means that the marketplace has many inefficiencies, and that “arbitrage opportunities will continue indefinitely.” For example, some markets pay a premium for security, geographical location, or simply because they don’t know they can get it cheaper somewhere else. In some cases, the price discrepancies across different exchanges can be as much as 43%.
Understand blockchain – You don’t need to understand the technical complexities, but a basic understanding will help you respond to news and announcements that may help you predict future price movements. It is essentially a continuously growing list of secure records (blocks). Cryptography secures the interactions and then stores them publicly. They serve as a public ledger, cutting out intermediaries such as banks.
Volumes indicate the liquidity of an asset. The greater the liquidity the easier it is to buy and sell, even when there is turmoil, and the lower the Bid-Offer spread and therefore the cost of trading. You want to avoid assets with tiny liquidity as when the shit hits the fan it will be costly to exit. Bitcoin has world-class liquidity. I run a crypoasset analysis site named Here is a screen-grab of the most liquid assets in the world.

Swing trading concerns individuals that hold a cryptocurrency over a set period of time, usually a few days or weeks. Swing traders will then attempt to determine the overall trend of their cryptocurrency holding and execute trades based on its overall upward or downward trend. The success of swing trading is largely dependent on an individual’s ability to time the market, which is an extremely difficult feat to achieve given just how quickly the cryptocurrency market can turn. Thus, swing trading is no doubt one of the more riskier trading strategies to pursue.
On top of that, the cryptocurrency market travels at lightspeed compared to other markets. New coins enter the market on a daily basis (in 2016, there were about 550 different coins, today there are about 1,500), and each one has news every day. I’m not doubting your ability to consume and analyze news, but that level of information bombardment will always be more effectively consumed as a group. In these communities, you’ll see members link news and relevant articles about coins you’ve invested in and coins you’ve never heard of. The community will definitely expand your knowledge much faster than doing it all yourself.
This is probably the most important factor to look at when deciding whether a cryptocurrency will survive into the future or not. Some cryptocurrencies, apart from acting as coins and trading assets, also provide platforms, serve as the fastest means to move money across the globe, try to solve a certain problem in society or in the cryptocurrency ecosystem, and do a lot more.
You could try this instead: Be sure to keep reading crypto news and price analyses — not just staring at charts. Even though you shouldn’t give in to the FOMO and FUD generated by many crypto articles, you still need the news in order to stay apprised of market conditions. Also consider setting stop-loss orders to ensure that your losses will be mitigated in the event of something like contagion. 
Always pay attention to Bitcoin. Most altcoins (every cryptocurrency except Bitcoin) are pegged more closely to Bitcoin than Asian currencies were to the USD during the Asian Financial Crisis. If Bitcoin price pump drastically, altcoins price can go down as people try to exit altcoins to ride the BTC profits; inversely, if Bitcoin prices dump drastically, altcoin prices can go down, too, as people exit altcoins to exchange back into fiat. The best times for altcoin growth appear when Bitcoin shows organic growth or decline, or remains stagnant in price.