examples/offset/output.txt
+------------+-------+--------+------+
| date | price | offset | prev |
+------------+-------+--------+------+
| 2015-03-11 | 2044 | | |
| 2015-03-12 | 2041 | | 2044 |
| 2015-03-13 | 2064 | 2044 | 2041 |
| 2015-03-16 | 2055 | 2041 | 2064 |
| 2015-03-17 | 2080 | 2064 | 2055 |
| 2015-03-18 | 2072 | 2055 | 2080 |
| 2015-03-19 | 2098 | 2080 | 2072 |
| 2015-03-20 | 2090 | 2072 | 2098 |
| 2015-03-23 | 2107 | 2098 | 2090 |
| 2015-03-24 | 2103 | 2090 | 2107 |
+------------+-------+--------+------+
+------------+-------------+---------------------+
| date | close | change |
+------------+-------------+---------------------+
| 2015-03-11 | 2040.23999 | |
| 2015-03-12 | 2065.949951 | 25.70996100000002 |
| 2015-03-13 | 2053.399902 | -12.550048999999944 |
| 2015-03-16 | 2081.189941 | 27.79003899999998 |
| 2015-03-17 | 2074.280029 | -6.909912000000077 |
| 2015-03-18 | 2099.5 | 25.219970999999987 |
| 2015-03-19 | 2089.27002 | -10.229980000000069 |
| 2015-03-20 | 2108.100098 | 18.830077999999958 |
| 2015-03-23 | 2104.419922 | -3.6801759999998467 |
| 2015-03-24 | 2091.5 | -12.919922000000042 |
+------------+-------------+---------------------+