Years ago, when stocks were quoted in fractions, there was a standard spread of 1/16 of a dollar or a "teenie". This spread allowed scalp traders to buy a stock at the bid and immediately sell at the ask. Hence the teenie presented clear entry and exit levels for scalp traders. The scalp trading game took a turn for the worst when the market converted to the decimal system. The decimal system closed the "teenie" often times to within 1 penny for high volume stocks. This overnight shifted the strategy for scalp traders. A scalp trader now had to rely more on their instincts, level II, and the time and sales window.
Tactics used to take advantage of the uptrend can also be applied to trade the downtrend. Again, since it’s very difficult to predict exactly how long a bear rally, or “counter trend” may last, you should enter a bearish swing trade only after it seems that the stock has continued downwards. To do this, examine the bear rally very closely. If the stock heads lower than the counter trend’s previous day’s low, the swing trader could enter a bearish position.
It is important to understand the fundamentals of intraday trading in order to make consistent profits. A good tip is to trade with the current market trend. If the market is falling, sell first and buy later, and vice versa. Make an intraday trade plan and stick to the plan. Set your desired profit and stop-loss limit. Do not be greedy. Instead, book your profits at regular intervals. Maintain stop-loss levels. It helps you to limit your loss if the market does not perform. Also, choose highly liquid shares and trade in a small number of shares at a time, if you are not a seasoned trader.
On the other hand, a bearish crossover occurs when the price of a security falls below these EMAs. This signals a potential reversal of a trend, and it can be used to time an exit of a long position. When the nine-period EMA crosses below the 13-period EMA, it signals a short entry or an exit of a long position. However, the 13-period EMA has to below the 50-period EMA or cross below it.

Your account will be designated as “day trader status” if you have 3 round trip trades (one round trip = an opening and closing transaction), in a rolling 5 business day period. If you have 4 round trip trades in a 5 day period, you will be restricted from day trading for 90 days. Your brokerage firm will probably allow you to buy a stock and hold it overnight before closing the position. If you have a second day trade violation, your account will either be restricted from trading or you can request your account be a non day trader status account and buy and then sell after 3 business days. This depends upon the specific brokerage firms rules for some of these details but they are getting very strict with enforcing these rules.

ECN/Level 2 quotes: ECNs, or electronic communication networks, are computer-based systems that display the best available bid and ask quotes from multiple market participants and then automatically match and execute orders. Level 2 is a subscription-based service that provides real-time access to the Nasdaq order book composed of price quotes from market makers registering every Nasdaq-listed and OTC Bulletin Board security. Together, they can give you a sense of orders being executed in real time.