Returns a DataFrame with the required format for 
	a candlestick or ohlc plot
	df[['open','high','low','close','volume']

	Parameters:
	-----------
		n : int
			Number of ohlc points

def ohlcv(n=100):
	"""
	Returns a DataFrame with the required format for 
	a candlestick or ohlc plot
	df[['open','high','low','close','volume']

	Parameters:
	-----------
		n : int
			Number of ohlc points
		
	"""	
	df=ohlc()
	df['volume']=[np.random.randint(1000,10000) for _ in range(len(df))]
	return df